Polymorphs of ARRY-380, a selective HER 2 inhibitor and pharmaceutical compositions containing them

ABSTRACT

Polymorphs of N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine are provided herein. Processes for preparing the polymorphs and pharmaceutical composition comprising the polymorphs are also disclosed.

RELATED APPLICATIONS

This application claims priority to U.S. Provisional Application No. 61/547,615 that was filed on Oct. 14, 2011 and U.S. Provisional Application No. 61/606,185 that was filed on Mar. 2, 2012. The entire content of these provisional applications are hereby incorporated herein by reference.

BACKGROUND OF THE INVENTION

1. Field of the Invention

Polymorphs of N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine are provided herein. Also, pharmaceutical compositions comprising polymorphs of N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine and processes for preparing the polymorphs are provided herein.

2. Description of the State of the Art

N4-(4-([1,2,4]Triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine (also called “ARRY-380”), which has the structure:

is a selective ErbB2 (HER2) inhibitor described in WO 2007/059257, which is incorporated by reference in its entirety. N4-(4-([1,2,4]Triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine has been tested in human clinical trials for hyperproliferative diseases, particularly cancer (see Koch, Kevin. “ARRY-380: A Selective, Oral HER2 Inhibitor for the Treatment of Solid Tumors.” American Association of Cancer Research 102^(nd) Annual Meeting, Apr. 3, 2011; which may also be found at: http://www.arraybiopharma.com/_documents/Publication/PubAttachment462.pdf).

Polymorphism is the occurrence of different crystalline forms of a single compound and it is a property of some compounds and complexes. Thus, polymorphs are distinct solids sharing the same molecular formula, yet each polymorph may have distinct solid state physical properties. Therefore, a single compound may give rise to a variety of polymorphic forms where each form has different and distinct solid state physical properties, such as different solubility profiles, melting point temperatures, flowability, dissolution rates and/or different X-ray diffraction peaks. These practical physical characteristics are influenced by the conformation and orientation of molecules in the unit cell, which defines a particular polymorphic form of a substance. Due to the possibility of variable solubility of each polymorph, identifying the existence of pharmaceutical polymorphs is essential for providing pharmaceuticals with predictable solubility profiles. It is desirable to investigate all solid state forms of a drug, including all polymorphic forms, and to determine the stability, dissolution and flow properties of each polymorphic form. Polymorphic forms of a compound can be distinguished in a laboratory by X-ray diffraction spectroscopy, such as X-ray powder diffraction (“XRPD”), and by other methods, such as infrared spectrometry. Additionally, polymorphic forms of the same drug substance or active pharmaceutical ingredient can be administered by itself or formulated as a drug product (pharmaceutical composition) and are well known in the pharmaceutical art to affect, for example, the solubility, stability, flowability, tractability and compressibility of drug substances and the safety and efficacy of drug products. For more, see Hilfiker, Rolf (ed.), Polymorphism in the Pharmaceutical Industry. Weinheim, Germany: Wiley-VCH 2006.

The discovery of new polymorphic forms of a pharmaceutically useful compound provides a new opportunity to improve the performance characteristics of a pharmaceutical product. It has now been surprisingly found that new crystalline forms of N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine exist.

SUMMARY OF THE INVENTION

Polymorphic forms of N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine are described herein, including Forms A, B, C, D, E, F, G, H, I, J, K, L, M, N, O and P. Additionally, amorphous N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine is described herein. Accordingly, the compounds are useful in the treatment of hyperproliferative diseases, such as cancer.

Another aspect provides methods of preventing or treating a disease or disorder modulated by ErbB2, comprising administering to a mammal in need of such treatment an effective amount of a compound described herein.

Another aspect provides methods of preventing or treating cancer, comprising administering to a mammal in need of such treatment an effective amount of a compound described herein, alone or in combination with one or more additional compounds having anti-cancer properties.

Another aspect provides a method of treating a hyperproliferative disease in a mammal comprising administering a therapeutically effective amount of a compound described herein to the mammal.

Another aspect provides the use of a compound of this invention in the manufacture of a medicament for the treatment of a hyperproliferative disease.

Another aspect provides compounds described herein for use in the treatment of cancer.

Another aspect provides a pharmaceutical composition comprising a compound described herein, and a pharmaceutically acceptable carrier or excipient.

Another aspect provides processes for preparing compounds described herein.

BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 shows a characteristic XRPD scan of Form A.

FIG. 2 shows a characteristic XRPD scan of Form B Methanol.

FIG. 3 shows a characteristic XRPD scan of Form B Ethanol.

FIG. 4 shows a characteristic XRPD scan of Form B Isopropyl Alcohol.

FIG. 5 shows a characteristic XRPD scan of Form B Acetonitrile.

FIG. 6 shows a characteristic XRPD scan of Form B Acetone.

FIG. 7 shows a characteristic XRPD scan of Form B Dichloromethane.

FIG. 8 shows a characteristic XRPD scan of Form B Tetrahydrofuran.

FIG. 9 shows a characteristic XRPD scan of Form B Anhydrous.

FIG. 10 shows a characteristic XRPD scan of Form C.

FIG. 11 shows a characteristic XRPD scan of Form D Ethyl Acetate.

FIG. 12 shows a characteristic XRPD scan of Form D Dioxane.

FIG. 13 shows a characteristic XRPD scan of Form D Acetone.

FIG. 14 shows a characteristic XRPD scan of Form D Propyl Acetate.

FIG. 15 shows a characteristic XRPD scan of Form E.

FIG. 16 shows a characteristic XRPD scan of Form F.

FIG. 17 shows a characteristic XRPD scan of Form G hemi-Tetrahydrofuran.

FIG. 18 shows a characteristic XRPD scan of Form G mono-Tetrahydrofuran.

FIG. 19 shows a characteristic XRPD scan of Form G Isopropyl Acetate.

FIG. 20 shows a characteristic XRPD scan of Form G Methyl Isobutyl Ketone.

FIG. 21 shows a characteristic XRPD scan of Form H.

FIG. 22 shows a characteristic XRPD scan of Form I.

FIG. 23 shows a characteristic XRPD scan of Form J.

FIG. 24 shows a characteristic XRPD scan of Form K.

FIG. 25 shows a characteristic XRPD scan of Form L.

FIG. 26 shows a characteristic XRPD scan of Form M.

FIG. 27 shows a characteristic XRPD scan of Form N.

FIG. 28 shows a characteristic XRPD scan of Form O.

FIG. 29 shows a characteristic XRPD scan of Form P.

FIG. 30 shows a characteristic XRPD scan of amorphous N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine.

FIG. 31 shows a characteristic differential scanning calorimetry (“DSC”) scan of Form A.

FIG. 32 shows a characteristic DSC scan of Form B Methanol.

FIG. 33 shows a characteristic DSC scan of Form B Ethanol.

FIG. 34 shows a characteristic DSC scan of Form B Isopropyl Alcohol.

FIG. 35 shows a characteristic DSC scan of Form B Acetonitrile.

FIG. 36 shows a characteristic DSC scan of Form B Acetone.

FIG. 37 shows a characteristic DSC scan of Form B Dichloromethane.

FIG. 38 shows a characteristic DSC scan of Form B Tetrahydrofuran.

FIG. 39 shows a characteristic DSC scan of Form C.

FIG. 40 shows a characteristic DSC scan of Form D Ethyl Acetate.

FIG. 41 shows a characteristic DSC scan of Form D Dioxane.

FIG. 42 shows a characteristic DSC scan of Form D Acetone.

FIG. 43 shows a characteristic DSC scan of Form D Propyl Acetate.

FIG. 44 shows a characteristic DSC scan of Form E.

FIG. 45 shows a characteristic DSC scan of Form F.

FIG. 46 shows a characteristic DSC scan of Form G hemi-Tetrahydrofuran.

FIG. 47 shows a characteristic DSC scan with a thermal gravimetric analysis (“TGA”) overlay of Form G mono-Tetrahydrofuran.

FIG. 48 shows a characteristic DSC scan of Form G Isopropyl Acetate.

FIG. 49 shows a characteristic DSC scan of Form G Methyl Isobutyl Ketone.

FIG. 50 shows a characteristic DSC scan of Form H.

FIG. 51 shows a characteristic DSC scan of Form I.

FIG. 52 shows a characteristic DSC scan of Form K.

FIG. 53 shows a characteristic DSC scan of Form L.

FIG. 54 shows a characteristic DSC scan of Form M.

FIG. 55 shows a characteristic DSC scan of Form N.

FIG. 56 shows a characteristic DSC scan of Form O.

FIG. 57 shows a characteristic DSC scan of Form P.

FIG. 58 shows a characteristic mDSC scan of amorphous N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine.

DETAILED DESCRIPTION OF THE INVENTION

Reference will now be made in detail to certain embodiments, examples of which are illustrated in the accompanying structures and formulas. While enumerated embodiments will be described, it will be understood that they are not intended to limit the invention to those embodiments. On the contrary, the invention is intended to cover all alternatives, modifications, and equivalents, which may be included within the scope of the present invention as defined by the claims. One skilled in the art will recognize many methods and materials similar or equivalent to those described herein, which could be used in the practice of the present invention. The present invention is in no way limited to the methods and materials described. In the event that one or more of the incorporated literature and similar materials differs from or contradicts this application, including but not limited to defined terms, term usage, described techniques, or the like, this application controls.

DEFINITIONS

Some alkyl moieties have been abbreviated, for example, methyl (“Me”) and ethyl (“Et”). The abbreviations are sometimes used in conjunction with elemental abbreviations and chemical structures, for example, methanol (“MeOH”) or ethanol (“EtOH”). Additional abbreviations used throughout the application may include, for example, acetate (“Ac”), acetonitrile (“ACN”), dichloromethane (“DCM”), dimethoxyethane (“DME”), ethyl acetate (“EtOAc”), isopropyl alcohol (“IPA”), methyl acetate (“MeOAc”), methyl isobutyl ketone (“MIBK”), methyl tert-butyl ether (“MTBE”), sodium carboxymethyl cellulose (“NaCMC”) and tetrahydrofuran (“THF”).

The term “about” is used herein to mean approximately, in the region of, roughly, or around. When the term “about” is used in conjunction with a numerical range, it modifies that range by extending the boundaries above and below the numerical values set forth. In general, the term “about” is used herein to modify a numerical value above and below the stated value by a variance of 20%. In regard to 2θ degrees, the term about means±0.2 degrees for polymorphs and ±0.6 degrees for isomorphic polymorphs, unless stated otherwise.

The terms “cancer” and “cancerous” refer to or describe the physiological condition in mammals that is typically characterized by abnormal or unregulated cell growth. A “tumor” comprises one or more cancerous cells. Examples of cancer include, but are not limited to, carcinoma, lymphoma, blastoma, sarcoma, and leukemia or lymphoid malignancies. More particular examples of such cancers include squamous cell cancer (e.g., epithelial squamous cell cancer), lung cancer including small cell lung cancer, non-small cell lung cancer (“NSCLC”), adenocarcinoma of the lung and squamous carcinoma of the lung, cancer of the peritoneum, hepatocellular cancer, gastric or stomach cancer including gastrointestinal cancer, pancreatic cancer, glioblastoma, cervical cancer, ovarian cancer, liver cancer, bladder cancer, hepatoma, breast cancer, colon cancer, rectal cancer, colorectal cancer, brain, endometrial or uterine carcinoma, salivary gland carcinoma, kidney or renal cancer, prostate cancer, vulval cancer, thyroid cancer, hepatic carcinoma, anal carcinoma, penile carcinoma, skin cancer, including melanoma, as well as head and neck cancer.

The term “mammal” means a warm-blooded animal that has or is at risk of developing a disease described herein and includes, but is not limited to, guinea pigs, dogs, cats, rats, mice, hamsters, and primates, including humans.

The phrase “pharmaceutically acceptable” indicates that the substance or composition is compatible chemically and/or toxicologically, with the other ingredients comprising a formulation, and/or the mammal being treated therewith.

The phrase “substantially pure” means the polymorphic form or amorphous material includes less than about 15% by weight of impurities, including other polymorphic forms. In certain embodiments, the substantially pure polymorphic form or amorphous material includes less than about 10% by weight of impurities, including other polymorphic forms. In certain embodiments, the substantially pure polymorphic form or amorphous material includes less than about 5% by weight of impurities, including other polymorphic forms. In certain embodiments, the substantially pure polymorphic form or amorphous material includes less than about 1% by weight of impurities, including other polymorphic forms.

The phrases “therapeutically effective amount” or “effective amount” mean an amount of a compound described herein that, when administered to a mammal in need of such treatment, sufficient to (i) treat or prevent the particular disease, condition, or disorder, (ii) attenuate, ameliorate, or eliminate one or more symptoms of the particular disease, condition, or disorder, or (iii) prevent or delay the onset of one or more symptoms of the particular disease, condition, or disorder described herein. The amount of a compound that will correspond to such an amount will vary depending upon factors such as the particular compound, disease condition and its severity, the identity (e.g., weight) of the mammal in need of treatment, but can nevertheless be routinely determined by one skilled in the art.

The terms “treat” or “treatment” refer to therapeutic, prophylactic, palliative or preventative measures. Beneficial or desired clinical results include, but are not limited to, alleviation of symptoms, diminishment of extent of disease, stabilized (i.e., not worsening) state of disease, delay or slowing of disease progression, amelioration or palliation of the disease state, and remission (whether partial or total), whether detectable or undetectable. “Treatment” can also mean prolonging survival as compared to expected survival if not receiving treatment. Those in need of treatment include those already with the condition or disorder, as well as those prone to have the condition or disorder or those in which the condition or disorder is to be prevented.

Polymorphs

Provided herein are polymorphs of N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine freebase, designated Forms A, B, C, D, E, F, G, H, I, J, K, L, M, N, O and P. Also, provided herein is amorphous N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine. Processes for preparing the polymorphs, and pharmaceutical compositions thereof that are potentially useful in the treatment of diseases, conditions and/or disorders modulated by ErbB2 are also provided.

Many of the polymorphs described herein are solvates. However, some of the polymorphs are not solvates, but exist, for example, as anhydrous forms. Also, some of the polymorphs are isomorphic solvate polymorphs (or solvatomorph), which crystallize in the same space group with slight variation of cell parameters and comprise chemically related structures but different elemental composition. In this case, the variation in chemical composition among the isomorphs arises from incorporation of different water/solvent molecules. Consequently, the isomorphs display similar but non-identical XRPD patterns. For more information on isomorphic polymorphs, see Hilfiker, supra.

Form A

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form A is provided. In certain embodiments, a substantially pure crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form A is provided. Form A can be distinguished by the XRPD diffraction in FIG. 1 and/or peak assignments of the XRPD diffraction of FIG. 1 in Table 1.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form A, characterized by at least one specific XRPD diffraction peak at about (2θ degrees±0.2) 20.3 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form A, characterized by at least one specific XRPD diffraction peak at about (2θ degrees±0.2) 20.278 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form A, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 19.1, 20.3, 21.9, 23.1 and 25.2 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form A, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 19.138, 20.278, 21.863, 23.139 and 25.202 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form A, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 16.9, 19.1, 20.3, 21.1, 21.9, 23.1 and 25.2 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form A, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 16.94, 19.138, 20.278, 21.16, 21.863, 23.139 and 25.202 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form A, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 12.8, 13.6, 16.3, 16.9, 19.1, 19.4, 20.3, 21.1, 21.9, 23.1, 24.5 and 25.2 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form A, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 12.78, 13.637, 16.3, 16.94, 19.138, 19.44, 20.278, 21.16, 21.863, 23.139, 24.519 and 25.202 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form A which has an XRPD diffraction pattern substantially the same as FIG. 1 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form A which is characterized by XRPD diffraction peaks (2θ degrees±0.2) substantially the same as Table 1 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form A which is characterized by endotherms at about 203.7° C. and 240.0° C. is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form A which is characterized by a DSC scan substantially the same as FIG. 31 is provided.

\Certain embodiments provide a process for preparing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form A comprising:

(a) mixing amorphous N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine and 1:1 EtOH:water; and

(b) recrystallizing the solid to prepare Form A.

In certain embodiments, the mixture in Step (a) is heated. In a further embodiment, the mixture in Step (a) is heated to about 50° C.

Form B

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B is provided. In certain embodiments, a substantially pure crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B is provided. Form B forms isomorphic solvates. Form B can be distinguished by the representative XRPD diffraction in FIGS. 2 to 9 and/or representative peak assignments of the XRPD diffraction of FIGS. 2 to 9 in Tables 2 to 9.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B, characterized by XRPD diffraction peaks at about (2θ degrees±0.3) 9.9 and 25.5 is provided. In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 9.9 and 25.5 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B, characterized by XRPD diffraction peaks at about (2θ degrees±0.3) 9.9, 16.9, 18.0, 20.7 and 25.5 is provided. In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 9.9, 16.9, 18.0, 20.7 and 25.5 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B, characterized by XRPD diffraction peaks at about (2θ degrees±0.3) 8.4, 9.9, 13.4, 16.9, 18.0, 20.7, 21.2, 24.7 and 25.5 is provided. In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 8.4, 9.9, 16.9, 18.0, 20.7, 21.2 and 25.5 is provided.

Certain embodiments provide a process for preparing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B comprising:

(a1) mixing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E with a solvent selected from MeOH, or

(a2) mixing amorphous N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine and a solvent selected from MeOH, acetone and DCM, or

(a3) mixing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form C/G mixture with a solvent selected from EtOH, or

(a4) mixing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form A with a solvent selected from IPA,

(b) creating a solution with the N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine and the solvent, and

(c) recrystallizing the solid to prepare Form B; or

(d1) mixing either N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E or amorphous N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine and ACN, or

(d2) mixing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G mono-Tetrahydrofuran and THF, and

(e) recrystallizing the solid to prepare Form B; or

(f) heating N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Ethanol, and

(g) recovering the solid to prepare Form B.

In certain embodiments, the solution in Step (b) is created by heating the mixture of Step (a2) or (a4) to reflux.

In certain embodiments, the solution in Step (b) is created by using EtOH as the solvent and heating the mixture of Step (a3) to about 70° C.

In certain embodiments, the heating in Step (f) is done at about 100 to about 200° C.

In certain embodiments, the solvent in Step (a2) is selected from acetone and DCM

In certain embodiments, N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E is used in Step (d1).

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Methanol is provided. In certain embodiments, a substantially pure crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Methanol is provided. Form B Methanol can be distinguished by the XRPD diffraction in FIG. 2 and/or peak assignments of the XRPD diffraction of FIG. 2 in Table 2.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Methanol, characterized by at least one specific XRPD diffraction peak at about (2θ degrees±0.2) 10.0 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Methanol, characterized by at least one specific XRPD diffraction peak at about (2θ degrees±0.2) 9.98 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Methanol, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 8.5, 10.0, 13.4, 17.0 and 25.5 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Methanol, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 8.46, 9.98, 13.438, 16.981 and 25.519 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Methanol, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 8.5, 10.0, 13.4, 17.0, 18.0, 20.8, 24.7 and 25.5 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Methanol, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 8.46, 9.98, 13.438, 16.981, 18.042, 20.799, 24.72 and 25.519 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Methanol, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 8.5, 10.0, 13.4, 15.8, 17.0, 18.0, 19.7, 20.8, 21.1, 21.6, 23.2, 24.7 and 25.5 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Methanol, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 8.46, 9.98, 13.438, 15.802, 16.981, 18.042, 19.72, 20.799, 21.143, 21.622, 23.161, 24.72 and 25.519 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Methanol which has an XRPD diffraction pattern substantially the same as FIG. 2 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Methanol which is characterized by XRPD diffraction peaks (2θ degrees±0.2) substantially the same as Table 2 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Methanol which is characterized by an endotherm at about 226.8° C. is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Methanol which is characterized by a DSC scan substantially the same as FIG. 32 is provided.

Certain embodiments provide a process for preparing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Methanol comprising:

(a) mixing either N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E or amorphous N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine with MeOH;

(b) creating a solution with the N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine and MeOH; and

(c) recrystallizing the solid to prepare Form B Methanol.

In certain embodiments, the solution in Step (b) is created by heating the mixture of Step (a) to reflux.

In certain embodiments, N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E is used in Step (a).

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Ethanol is provided. In certain embodiments, a substantially pure crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Ethanol is provided. Form B Ethanol can be distinguished by the XRPD diffraction in FIG. 3 and/or peak assignments of the XRPD diffraction of FIG. 3 in Table 3.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Ethanol, characterized by at least one specific XRPD diffraction peak at about (2θ degrees±0.2) 25.4 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Ethanol, characterized by at least one specific XRPD diffraction peak at about (2θ degrees±0.2) 25.4 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Ethanol, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 9.9, 13.3, 20.7, 24.6 and 25.4 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Ethanol, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 9.859, 13.3, 20.718, 24.621 and 25.419 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Ethanol, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 9.9, 13.3, 16.9, 17.9, 19.6, 20.7, 21.5, 23.1, 24.6 and 25.4 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Ethanol, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 9.859, 13.3, 16.862, 17.94, 19.602, 20.718, 21.502, 23.08, 24.621 and 25.419 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Ethanol which has an XRPD diffraction pattern substantially the same as FIG. 3 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Ethanol which is characterized by XRPD diffraction peaks (2θ degrees±0.2) substantially the same as Table 3 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Ethanol which is characterized by an endotherm at about 224.8° C. is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Ethanol which is characterized by a DSC scan substantially the same as FIG. 33 is provided.

Certain embodiments provide a process for preparing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Ethanol comprising:

(a) mixing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form C/G mixture with EtOH;

(b) creating a solution with the N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine and EtOH; and

(c) recrystallizing the solid to prepare Form B Ethanol.

In certain embodiments, the solution in Step (b) is created by heating the mixture of Step (a) to about 70° C.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Isopropyl Alcohol is provided. In certain embodiments, a substantially pure crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Isopropyl Alcohol is provided. Form B Isopropyl Alcohol can be distinguished by the XRPD diffraction in FIG. 4 and/or peak assignments of the XRPD diffraction of FIG. 4 in Table 4.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Isopropyl Alcohol, characterized by at least one specific XRPD diffraction peak at about (2θ degrees±0.2) 16.9 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Isopropyl Alcohol, characterized by at least one specific XRPD diffraction peak at about (2θ degrees±0.2) 16.88 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Isopropyl Alcohol, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 9.8, 16.9, 17.9, 20.6 and 25.1 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Isopropyl Alcohol, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 9.78, 16.88, 17.899, 20.6 and 25.082 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Isopropyl Alcohol, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 9.8, 13.2, 16.9, 17.9, 20.6, 25.1 and 25.3 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Isopropyl Alcohol, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 9.78, 13.201, 16.88, 17.899, 20.6, 25.082 and 25.362 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Isopropyl Alcohol, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 8.3, 9.8, 13.2, 16.9, 17.9, 20.6, 21.2, 23.0, 24.2, 24.6, 25.1 and 25.3 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Isopropyl Alcohol, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 8.283, 9.78, 13.201, 16.88, 17.899, 20.6, 21.202, 22.981, 24.198, 24.582, 25.082 and 25.362 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Isopropyl Alcohol which has an XRPD diffraction pattern substantially the same as FIG. 4 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Isopropyl Alcohol which is characterized by XRPD diffraction peaks (2θ degrees±0.2) substantially the same as Table 4 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Isopropyl Alcohol which is characterized by an endotherm at about 222.3° C. is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Isopropyl Alcohol which is characterized by a DSC scan substantially the same as FIG. 34 is provided.

Certain embodiments provide a process for preparing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Isopropyl Alcohol comprising:

(a) mixing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form A with IPA;

(b) creating a solution with the N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine and IPA; and

(c) recrystallizing the solid to prepare Form B Isopropyl Alcohol.

In certain embodiments, the solution in Step (b) is created by heating the mixture of Step (a) to reflux.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Acetonitrile is provided. In certain embodiments, a substantially pure crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Acetonitrile is provided. Form B Acetonitrile can be distinguished by the XRPD diffraction in FIG. 5 and/or peak assignments of the XRPD diffraction of FIG. 5 in Table 5.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Acetonitrile, characterized by at least one specific XRPD diffraction peak at about (2θ degrees±0.2) 25.7 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Acetonitrile, characterized by at least one specific XRPD diffraction peak at about (2θ degrees±0.2) 25.661 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Acetonitrile, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 10.0, 13.5, 16.9, 24.9 and 25.7 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Acetonitrile, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 9.98, 13.46, 16.921, 24.899 and 25.661 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Acetonitrile, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 10.0, 13.5, 16.9, 21.7, 24.9 and 25.7 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Acetonitrile, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 9.98, 13.46, 16.921, 21.741, 24.899 and 25.661 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Acetonitrile, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 8.5, 10.0, 13.5, 16.9, 18.1, 19.8, 21.2, 21.7, 23.3, 24.9 and 25.7 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Acetonitrile, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 8.46, 9.98, 13.46, 16.921, 18.12, 19.842, 21.239, 21.741, 23.319, 24.899 and 25.661 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Acetonitrile which has an XRPD diffraction pattern substantially the same as FIG. 5 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Acetonitrile which is characterized by XRPD diffraction peaks (2θ degrees±0.2) substantially the same as Table 5 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Acetonitrile which is characterized by an endotherm at about 224.2° C. is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Acetonitrile which is characterized by a DSC scan substantially the same as FIG. 35 is provided.

Certain embodiments provide a process for preparing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Acetonitrile comprising:

(a) mixing either N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E or amorphous N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine and ACN; and

(b) recrystallizing the solid to prepare Form B Acetonitrile.

In certain embodiments, N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E is used in Step (a).

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Acetone is provided. In certain embodiments, a substantially pure crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Acetone is provided. Form B Acetone can be distinguished by the XRPD diffraction in FIG. 6 and/or peak assignments of the XRPD diffraction of FIG. 6 in Table 6.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Acetone, characterized by at least one specific XRPD diffraction peak at about (2θ degrees±0.2) 9.9 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Acetone, characterized by at least one specific XRPD diffraction peak at about (2θ degrees±0.2) 9.936 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Acetone, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 9.9, 17.0, 18.0, 24.7 and 25.5 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Acetone, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 9.936, 17.02, 17.98, 24.679 and 25.52 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Acetone, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 8.4, 9.9, 13.0, 17.0, 18.0, 19.8, 23.5, 24.7 and 25.5 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Acetone, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 8.378, 9.936, 13.041, 17.02, 17.98, 19.758, 23.498, 24.679 and 25.52 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Acetone which has an XRPD diffraction pattern substantially the same as FIG. 6 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Acetone which is characterized by XRPD diffraction peaks (2θ degrees±0.2) substantially the same as Table 6 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Acetone which is characterized by an endotherm at about 114.5° C. and 224.1° C. is provided. In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Acetone which is characterized by an endotherm at about 224.1° C. is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Acetone which is characterized by a DSC scan substantially the same as FIG. 36 is provided.

Certain embodiments provide a process for preparing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Acetone comprising:

(a) mixing amorphous N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine and acetone;

(b) creating a solution with the N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine and acetone; and

(c) recrystallizing the solid to prepare Form B Acetone.

In certain embodiments, the solution in Step (b) is created by heating the mixture of Step (a) to reflux.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Dichloromethane is provided. In certain embodiments, a substantially pure crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Dichloromethane is provided. Form B Dichloromethane can be distinguished by the XRPD diffraction in FIG. 7 and/or peak assignments of the XRPD diffraction of FIG. 7 in Table 7.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Dichloromethane, characterized by at least one specific XRPD diffraction peak at about (2θ degrees±0.2) 16.9 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Dichloromethane, characterized by at least one specific XRPD diffraction peak at about (2θ degrees±0.2) 16.918 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Dichloromethane, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 10.0, 13.4, 16.9, 20.7 and 25.6 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Dichloromethane, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 9.977, 13.381, 16.918, 20.738 and 25.641 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Dichloromethane, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 8.4, 10.0, 13.4, 16.9, 18.0, 20.7, 24.8 and 25.6 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Dichloromethane, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 8.439, 9.977, 13.381, 16.918, 18.041, 20.738, 24.779 and 25.641 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Dichloromethane, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 8.4, 10.0, 13.4, 16.9, 17.4, 18.0, 18.3, 19.9, 20.7, 21.2, 21.8, 23.5, 24.8 and 25.6 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Dichloromethane, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 8.439, 9.977, 13.381, 16.918, 17.438, 18.041, 18.34, 19.899, 20.738, 21.161, 21.802, 23.46, 24.779 and 25.641 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Dichloromethane which has an XRPD diffraction pattern substantially the same as FIG. 7 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Dichloromethane which is characterized by XRPD diffraction peaks (2θ degrees±0.2) substantially the same as Table 7 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Dichloromethane which is characterized by an endotherm at about 129.1° C. and 220.7° C. is provided. In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Dichloromethane which is characterized by an endotherm at about 220.7° C. is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Dichloromethane which is characterized by a DSC scan substantially the same as FIG. 37 is provided.

Certain embodiments provide a process for preparing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Dichloromethane comprising:

(a) mixing amorphous N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine and DCM;

(b) creating a solution with the N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine and DCM; and

(c) recrystallizing the solid to prepare Form B Dichloromethane.

In certain embodiments, the solution in Step (b) is created by heating the mixture of Step (a) to reflux.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Tetrahydrofuran is provided. In certain embodiments, a substantially pure crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Tetrahydrofuran is provided. Form B Tetrahydrofuran can be distinguished by the XRPD diffraction in FIG. 8 and/or peak assignments of the XRPD diffraction of FIG. 8 in Table 8.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Tetrahydrofuran, characterized by at least one specific XRPD diffraction peak at about (2θ degrees±0.2) 25.4 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Tetrahydrofuran, characterized by at least one specific XRPD diffraction peak at about (2θ degrees±0.2) 25.44 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Tetrahydrofuran, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 9.8, 16.7, 17.9, 24.7 and 25.4 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Tetrahydrofuran, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 9.819, 16.7, 17.92, 24.66 and 25.44 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Tetrahydrofuran, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 9.8, 13.4, 16.7, 17.9, 21.4, 24.7 and 25.4 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Tetrahydrofuran, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 9.819, 13.38, 16.7, 17.92, 21.4, 24.66 and 25.44 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Tetrahydrofuran, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 9.8, 13.4, 16.7, 17.9, 21.4, 22.9, 24.7 and 25.4 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Tetrahydrofuran, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 9.819, 13.38, 16.7, 17.92, 21.4, 22.92, 24.66 and 25.44 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Tetrahydrofuran which has an XRPD diffraction pattern substantially the same as FIG. 8 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Tetrahydrofuran which is characterized by XRPD diffraction peaks (2θ degrees±0.2) substantially the same as Table 8 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Tetrahydrofuran which is characterized by an endotherm at about 228.5° C. is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Tetrahydrofuran which is characterized by a DSC scan substantially the same as FIG. 38 is provided.

Certain embodiments provide a process for preparing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Tetrahydrofuran comprising:

(a) mixing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G mono-Tetrahydrofuran and THF; and

(b) recrystallizing the solid to prepare Form B Tetrahydrofuran.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Anhydrous is provided. In certain embodiments, a substantially pure crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Anhydrous is provided. Form B Anhydrous can be distinguished by the XRPD diffraction in FIG. 9 and/or peak assignments of the XRPD diffraction of FIG. 9 in Table 9.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Anhydrous, characterized by at least one specific XRPD diffraction peak at about (2θ degrees±0.2) 9.9 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Anhydrous, characterized by at least one specific XRPD diffraction peak at about (2θ degrees±0.2) 9.938 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Anhydrous, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 9.9, 13.6, 18.1, 21.5 and 25.5 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Anhydrous, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 9.938, 13.641, 18.1, 21.498 and 25.541 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Anhydrous, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 8.4, 9.9, 13.6, 16.8, 17.1, 18.1, 21.2, 21.5, 24.9 and 25.5 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Anhydrous, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 8.44, 9.938, 13.641, 16.841, 17.099, 18.1, 21.22, 21.498, 24.901 and 25.541 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Anhydrous which has an XRPD diffraction pattern substantially the same as FIG. 9 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Anhydrous which is characterized by XRPD diffraction peaks (2θ degrees±0.2) substantially the same as Table 9 is provided.

Certain embodiments provide a process for preparing N4-(4-[1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Anhydrous comprising:

(a) heating N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B; and

(b) recovering the solid to prepare Form B Anhydrous.

The Form B in Step (a) may be Form B Methanol, Ethanol, Isopropyl Alcohol, Acetonitrile, Acetone, Dichloromethane or Tetrahydrofuran. In certain embodiments, the Form B in Step (a) is Form B Ethanol. In certain embodiments, the heating in Step (a) is done at about 100 to about 200° C.

Form C

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form C is provided. In certain embodiments, a substantially pure crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form C is provided. Form C can be distinguished by the XRPD diffraction in FIG. 10 and/or peak assignments of the XRPD diffraction of FIG. 10 in Table 10.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form C, characterized by at least one specific XRPD diffraction peak at about (2θ degrees±0.2) 5.0 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form C, characterized by at least one specific XRPD diffraction peak at about (2θ degrees±0.2) 5.04 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form C, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 5.0, 14.4, 15.3, 18.4 and 18.9 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form C, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 5.04, 14.435, 15.301, 18.437 and 18.902 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form C, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 5.0, 7.2, 10.2, 14.4, 15.3, 15.7, 17.5, 18.4, 18.9, 19.6, 22.3 and 24.2 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form C, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 5.04, 7.159, 10.159, 14.435, 15.301, 15.717, 17.501, 18.437, 18.902, 19.638, 22.34 and 24.181 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form C, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 5.0, 7.2, 10.2, 14.4, 15.3, 15.7, 16.7, 17.5, 18.1, 18.4, 18.9, 19.6, 21.1, 21.4, 22.3 and 24.2 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form C, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 5.04, 7.159, 10.159, 14.435, 15.301, 15.717, 16.719, 17.501, 18.059, 18.437, 18.902, 19.638, 21.08, 21.437, 22.34 and 24.181 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form C which has an XRPD diffraction pattern substantially the same as FIG. 10 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form C which is characterized by XRPD diffraction peaks (2θ degrees±0.2) substantially the same as Table 10 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form C which is characterized by an endotherm at about 253.6° C. is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form C which is characterized by a DSC scan substantially the same as FIG. 39 is provided.

Certain embodiments provide a process for preparing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form C comprising:

(a) mixing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form A and 2-methoxyethanol;

(b) creating a solution with the N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine and 2-methoxyethanol; and

(c) recrystallizing the solid to prepare Form C.

In certain embodiments, the solution in Step (b) is created by heating the mixture of Step (a) to about 50° C.

Form D

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D is provided. In certain embodiments, a substantially pure crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D is provided. Form D forms isomorphic solvates. Form D can be distinguished by the representative XRPD diffraction in FIGS. 11 to 14 and/or representative peak assignments of the XRPD diffraction of FIGS. 11 to 14 in Tables 11 to 14.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D, characterized by XRPD diffraction peaks at about (2θ degrees±0.3) 8.0 and 12.7 is provided. In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 8.0 and 12.7 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D, characterized by XRPD diffraction peaks at about (2θ degrees±0.3) 8.0 and 12.6 is provided. In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 8.0 and 12.6 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D, characterized by XRPD diffraction peaks at about (2θ degrees±0.4) 8.0, 9.8, 11.3, 12.7, 13.9, 16.1, 17.1 and 19.8 is provided. In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 8.0, 9.8, 11.3, 12.7, 13.9 and 17.1 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D, characterized by XRPD diffraction peaks at about (2θ degrees±0.3) 8.0, 9.8, 11.3, 12.6, 13.9, 16.2, 17.2 and 19.7 is provided. In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 8.0, 9.8, 11.3, 12.6, 13.9, 17.2 and 19.7 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D, characterized by XRPD diffraction peaks at about (2θ degrees±0.5) 8.0, 9.8, 11.3, 12.7, 13.9, 16.1, 17.1, 19.8, 21.4, 22.1, 23.6, 25.3 and 27.5 is provided. In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 8.0, 9.8, 11.3, 12.7, 13.9, 17.2, 22.1 and 25.3 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D, characterized by XRPD diffraction peaks at about (2θ degrees±0.3) 8.0, 9.8, 11.3, 12.6, 13.9, 16.2, 17.2, 19.7, 21.3, 22.1, 23.4, 25.3 and 27.4 is provided. In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 8.0, 9.8, 11.3, 12.6, 13.9, 17.2, 19.7, 22.1 and 25.3 is provided.

Certain embodiments provide a process for preparing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D comprising:

(a1) mixing amorphous N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine and a solvent selected from EtOAc, dioxane and propyl acetate, or

(a2) mixing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E and a solvent selected from acetone and propyl acetate, and

(b) recrystallizing the solid to prepare Form D.

In certain embodiments, the solvent in Step (a1) is selected from EtOAc and dioxane.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Ethyl Acetate is provided. In certain embodiments, a substantially pure crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Ethyl Acetate is provided. Form D Ethyl Acetate can be distinguished by the XRPD diffraction in FIG. 11 and/or peak assignments of the XRPD diffraction of FIG. 11 in Table 11.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Ethyl Acetate, characterized by at least one specific XRPD diffraction peak at about (2θ degrees±0.2) 8.0 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Ethyl Acetate, characterized by at least one specific XRPD diffraction peak at about (2θ degrees±0.2) 7.959 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Ethyl Acetate, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 8.0, 12.7, 16.1, 17.1 and 19.8 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Ethyl Acetate, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 7.959, 12.66, 16.099, 17.118 and 19.761 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Ethyl Acetate, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 8.0, 9.8, 11.3, 12.7, 16.1, 17.1, 19.8 and 23.6 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Ethyl Acetate, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 7.959, 9.798, 11.321, 12.66, 16.099, 17.118, 19.761 and 23.599 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Ethyl Acetate which has an XRPD diffraction pattern substantially the same as FIG. 11 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Ethyl Acetate which is characterized by XRPD diffraction peaks (2θ degrees±0.2) substantially the same as Table 11 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Ethyl Acetate which is characterized by endotherms at about 113.0° C. and 240.3° C. is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Ethyl Acetate which is characterized by a DSC scan substantially the same as FIG. 40 is provided.

Certain embodiments provide a process for preparing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Ethyl Acetate comprising:

(a) mixing amorphous N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine and EtOAc; and

(b) recrystallizing the solid to prepare Form D Ethyl Acetate.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Dioxane is provided. In certain embodiments, a substantially pure crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Dioxane is provided. Form D Dioxane can be distinguished by the XRPD diffraction in FIG. 12 and/or peak assignments of the XRPD diffraction of FIG. 12 in Table 12.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Dioxane, characterized by at least one specific XRPD diffraction peak at about (2θ degrees±0.2) 19.5 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Dioxane, characterized by at least one specific XRPD diffraction peak at about (2θ degrees±0.2) 19.54 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Dioxane, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 7.8, 11.1, 12.5, 19.5 and 23.1 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Dioxane, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 7.822, 11.139, 12.5, 19.54 and 23.139 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Dioxane, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 7.8, 11.1, 12.5, 19.5, 21.1, 23.1, 24.0 and 27.2 is provided. Ina further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Dioxane, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 7.822, 11.139, 12.5, 19.54, 21.062, 23.139, 24.022 and 27.179 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Dioxane, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 7.8, 11.1, 12.5, 17.1, 17.7, 19.5, 21.1, 23.1, 24.0 and 27.2 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Dioxane, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 7.822, 11.139, 12.5, 17.135, 17.703, 19.54, 21.062, 23.139, 24.022 and 27.179 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Dioxane which has an XRPD diffraction pattern substantially the same as FIG. 12 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Dioxane which is characterized by XRPD diffraction peaks (2θ degrees±0.2) substantially the same as Table 12 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Dioxane which is characterized by endotherms at about 109.8° C., 238.2° C. and 250.2° C. and an exotherm at about 170.8° C. is provided. In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Dioxane which is characterized by endotherms at about 109.8° C., 238.2° C. and 250.2° C. is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Dioxane which is characterized by a DSC scan substantially the same as FIG. 41 is provided.

Certain embodiments provide a process for preparing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Dioxane comprising:

(a) mixing amorphous N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine and dioxane; and

(b) recrystallizing the solid to prepare Form D Dioxane.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Acetone is provided. In certain embodiments, a substantially pure crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Acetone is provided. Form D Acetone can be distinguished by the XRPD diffraction in FIG. 13 and/or peak assignments of the XRPD diffraction of FIG. 13 in Table 13.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Acetone, characterized by at least one specific XRPD diffraction peak at about (2θ degrees±0.2) 8.0 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Acetone, characterized by at least one specific XRPD diffraction peak at about (2θ degrees±0.2) 7.999 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Acetone, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 8.0, 17.1, 21.4, 23.6 and 27.5 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Acetone, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 7.999, 17.14, 21.378, 23.561 and 27.482 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Acetone, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 8.0, 13.9, 16.1, 17.1, 19.8, 21.4, 23.6 and 27.5 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Acetone, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 7.999, 13.923, 16.101, 17.14, 19.761, 21.378, 23.561 and 27.482 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Acetone, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 8.0, 9.9, 12.7, 13.9, 16.1, 17.1, 18.0, 19.8, 21.4, 22.1, 23.6, 24.3 and 27.5 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Acetone, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 7.999, 9.856, 12.681, 13.923, 16.101, 17.14, 18, 19.761, 21.378, 22.103, 23.561, 24.259 and 27.482 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Acetone which has an XRPD diffraction pattern substantially the same as FIG. 13 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Acetone which is characterized by XRPD diffraction peaks (2θ degrees±0.2) substantially the same as Table 13 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Acetone which is characterized by endotherms at about 108.5° C. and 235.1° C. is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Acetone which is characterized by a DSC scan substantially the same as FIG. 42 is provided.

Certain embodiments provide a process for preparing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Acetone comprising:

(a) mixing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E and acetone; and

(b) recrystallizing the solid to prepare Form D Acetone.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Propyl Acetate is provided. In certain embodiments, a substantially pure crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Propyl Acetate is provided. Form D Propyl Acetate can be distinguished by the XRPD diffraction in FIG. 14 and/or peak assignments of the XRPD diffraction of FIG. 14 in Table 14.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Propyl Acetate, characterized by at least one specific XRPD diffraction peak at about (2θ degrees±0.2) 8.0 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Propyl Acetate, characterized by at least one specific XRPD diffraction peak at about (2θ degrees±0.2) 7.999 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Propyl Acetate, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 8.0, 12.7, 16.1, 17.1 and 19.8 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Propyl Acetate, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 7.99, 12.719, 16.121, 17.16 and 19.782 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Propyl Acetate, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 8.0, 12.7, 16.1, 17.1, 19.8, 23.6 and 27.6 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Propyl Acetate, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 7.99, 12.719, 16.121, 17.16, 19.782, 23.62 and 27.579 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Propyl Acetate, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 8.0, 9.8, 12.7, 13.9, 16.1, 17.1, 18.0, 19.8, 21.4, 23.6, 24.3 and 27.6 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Propyl Acetate, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 7.99, 9.839, 12.719, 13.903, 16.121, 17.16, 18.021, 19.782, 21.42, 23.62, 24.28 and 27.579 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Propyl Acetate which has an XRPD diffraction pattern substantially the same as FIG. 14 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Propyl Acetate which is characterized by XRPD diffraction peaks (2θ degrees±0.2) substantially the same as Table 14 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Propyl Acetate which is characterized by endotherms at about 119.6° C. and 247.7° C. is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Propyl Acetate which is characterized by a DSC scan substantially the same as FIG. 43 is provided.

Certain embodiments provide a process for preparing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Propyl Acetate comprising:

(a) mixing either N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E or amorphous N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine and propyl acetate; and

(b) recrystallizing the solid to prepare Form D Propyl Acetate.

In certain embodiments, N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E is used in Step (a).

Form E

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E is provided. In certain embodiments, a substantially pure crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E is provided. Form E can be distinguished by the XRPD diffraction in FIG. 15 and/or peak assignments of the XRPD diffraction of FIG. 15 in Table 15.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E, characterized by at least one specific XRPD diffraction peak at about (2θ degrees±0.2) 16.1 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E, characterized by at least one specific XRPD diffraction peak at about (2θ degrees±0.2) 16.06 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 8.7, 9.4, 11.9, 16.1 and 23.7 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 8.659, 9.353, 11.904, 16.06 and 23.739 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E which has an XRPD diffraction pattern substantially the same as FIG. 15 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E which is characterized by XRPD diffraction peaks (2θ degrees±0.2) substantially the same as Table 15 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E which is characterized by endotherms at about 149.7° C. and 253.1° C. is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E which is characterized by a DSC scan substantially the same as FIG. 44 is provided.

Certain embodiments provide a process for preparing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E comprising:

(a) mixing 1-(4-((4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methyl-phenyl)amino)quinazolin-6-yl)-3-(1-hydroxy-2-methylpropan-2-yl)thiourea in THF under basic conditions;

(b) adding water to the mixture to form an oil of N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine;

(c) recovering the product as N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E.

In certain embodiments, the basic conditions in Step (a) are provided by 2.5N NaOH.

Form F

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form F is provided. In certain embodiments, a substantially pure crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form F is provided. Form F can be distinguished by the XRPD diffraction in FIG. 16 and/or peak assignments of the XRPD diffraction of FIG. 16 in Table 16.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form F, characterized by at least one specific XRPD diffraction peak at about (2θ degrees±0.2) 16.6 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form F, characterized by at least one specific XRPD diffraction peak at about (2θ degrees±0.2) 16.56 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form F, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 14.9, 16.6, 16.9, 19.1 and 21.2 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form F, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 14.899, 16.56, 16.92, 19.098 and 21.18 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form F, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 14.9, 16.6, 16.9, 19.1, 21.2 and 22.5 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form F, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 14.899, 16.56, 16.92, 19.098, 21.18 and 22.537 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form F which has an XRPD diffraction pattern substantially the same as FIG. 16 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form F which is characterized by XRPD diffraction peaks (2θ degrees±0.2) substantially the same as Table 16 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form F which is characterized by endotherms at about 122.7° C., 234.2° C. and 250.5° C. is provided. In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form F which is characterized by endotherms at about 122.7° C. and 250.5° C. is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form F which is characterized by a DSC scan substantially the same as FIG. 45 is provided.

Certain embodiments provide a process for preparing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form F comprising:

(a) mixing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E and ethyl acetate; and

(b) recrystallizing the solid to prepare Form F.

Form G

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G is provided. In certain embodiments, a substantially pure crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G is provided. Form G forms isomorphic solvates. Form G can be distinguished by the representative XRPD diffraction in FIGS. 17 to 20 and/or representative peak assignments of the XRPD diffraction of FIGS. 17 to 20 in Tables 17 to 20.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G, characterized by XRPD diffraction peaks at about (2θ degrees±0.4) 7.8 and 23.1 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G, characterized by XRPD diffraction peaks at about (2θ degrees±0.3) 7.8 and 23.2 is provided. In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G, characterized by XRPD diffraction peak at about (2θ degrees±0.2) 7.8 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G, characterized by XRPD diffraction peaks at about (2θ degrees±0.4) 7.8, 11.1 and 23.1 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G, characterized by XRPD diffraction peaks at about (2θ degrees±0.3) 7.8, 11.2 and 23.2 is provided. In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 7.8 and 11.2 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G, characterized by XRPD diffraction peaks at about (2θ degrees±0.5) 7.8, 8.2, 9.4, 11.1, 16.6, 23.1, 24.1 and 27.8 is provided. In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 7.8, 8.2, 9.4 and 16.6 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G, characterized by XRPD diffraction peaks at about (2θ degrees±0.3) 7.8, 8.1, 9.3, 11.2, 16.6, 23.2, 24.3 and 27.6 is provided. In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 7.8, 8.1, 9.3, 11.2 and 16.6 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G, characterized by XRPD diffraction peaks at about (2θ degrees±0.5) 5.6, 7.8, 8.2, 9.4, 11.1, 12.7, 15.6, 16.6, 20.0, 21.0, 23.1, 23.4, 24.1 and 27.8 is provided. In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 5.6, 7.8, 8.2, 9.4, 12.7 and 16.6 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G, characterized by XRPD diffraction peaks at about (2θ degrees±0.3) 5.6, 7.8, 8.1, 9.3, 11.2, 12.7, 15.7, 16.6, 20.0, 21.2, 23.2, 23.5, 24.3 and 27.6 is provided. In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 5.6, 7.8, 8.1, 9.3, 11.2, 12.7, 16.6 and 21.2 is provided.

Certain embodiments provide a process for preparing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G comprising:

(a1) mixing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G mono-Tetrahydrofuran and 20:80 THF:water, or

(a2) mixing either N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E or amorphous N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine and a solvent selected from isopropyl acetate and MIBK, and

(b) recrystallizing the solid to prepare Form G; or

(c) mixing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form A and tetrahydrofuran,

(d) creating a solution with the N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine and THF, and

(e) recrystallizing the solid to prepare Form G.

In certain embodiments, the solution in Step (d) is created by heating the mixture of Step (c) to reflux.

In certain embodiments, N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E is used in Step (a2).

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G hemi-Tetrahydrofuran is provided. In certain embodiments, a substantially pure crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G hemi-Tetrahydrofuran is provided. Form G hemi-Tetrahydrofuran can be distinguished by the XRPD diffraction in FIG. 17 and/or peak assignments of the XRPD diffraction of FIG. 17 in Table 17.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G hemi-Tetrahydrofuran, characterized by at least one specific XRPD diffraction peak at about (2θ degrees±0.2) 23.1 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G hemi-Tetrahydrofuran, characterized by at least one specific XRPD diffraction peak at about (2θ degrees±0.2) 23.079 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G hemi-Tetrahydrofuran, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 7.7, 11.1, 12.3, 23.1 and 24.1 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G hemi-Tetrahydrofuran, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 7.719, 11.102, 12.281, 23.079 and 24.099 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G hemi-Tetrahydrofuran, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 7.7, 11.1, 12.3, 23.1, 24.1 and 27.5 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G hemi-Tetrahydrofuran, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 7.719, 11.102, 12.281, 23.079, 24.099 and 27.503 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G hemi-Tetrahydrofuran which has an XRPD diffraction pattern substantially the same as FIG. 17 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G hemi-Tetrahydrofuran which is characterized by XRPD diffraction peaks (2θ degrees±0.2) substantially the same as Table 17 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G hemi-Tetrahydrofuran which is characterized by endotherms at about 106.1° C. and 232.3° C. is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G hemi-Tetrahydrofuran which is characterized by a DSC scan substantially the same as FIG. 46 is provided.

Certain embodiments provide a process for preparing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G hemi-Tetrahydrofuran comprising:

(a) mixing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G mono-Tetrahydrofuran and 20:80 THF:water; and

(b) recrystallizing the solid to prepare Form G hemi-Tetrahydrofuran.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G mono-Tetrahydrofuran is provided. In certain embodiments, a substantially pure crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G mono-Tetrahydrofuran is provided. Form G mono-Tetrahydrofuran can be distinguished by the XRPD diffraction in FIG. 18 and/or peak assignments of the XRPD diffraction of FIG. 18 in Table 18.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G mono-Tetrahydrofuran, characterized by at least one specific XRPD diffraction peak at about (2θ degrees±0.2) 23.1 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G mono-Tetrahydrofuran, characterized by at least one specific XRPD diffraction peak at about (2θ degrees±0.2) 23.022 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G mono-Tetrahydrofuran, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 7.7, 11.1, 12.4, 23.0 and 24.0 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G mono-Tetrahydrofuran, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 7.72, 11.137, 12.401, 23.022 and 24.042 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G mono-Tetrahydrofuran, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 7.7, 8.0, 9.4, 11.1, 12.4, 16.6, 21.0, 23.0, 23.4, 24.0 and 27.5 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G mono-Tetrahydrofuran, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 7.72, 8.003, 9.417, 11.137, 12.401, 16.599, 21.017, 23.022, 23.397, 24.042 and 27.482 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G mono-Tetrahydrofuran which has an XRPD diffraction pattern substantially the same as FIG. 18 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G mono-Tetrahydrofuran which is characterized by XRPD diffraction peaks (2θ degrees±0.2) substantially the same as Table 18 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G mono-Tetrahydrofuran which is characterized by endotherms at about 113.2° C. and 232.3° C. is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G mono-Tetrahydrofuran which is characterized by a DSC scan substantially the same as FIG. 47 is provided.

Certain embodiments provide a process for preparing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G mono-Tetrahydrofuran comprising:

(a) mixing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form A and tetrahydrofuran;

(b) creating a solution with the N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine and THF; and

(c) recrystallizing the solid to prepare Form G mono-Tetrahydrofuran.

In certain embodiments, the solution in Step (b) is created by heating the mixture of Step (a) to reflux.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G Isopropyl Acetate is provided. In certain embodiments, a substantially pure crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G Isopropyl Acetate is provided. Form G Isopropyl Acetate can be distinguished by the XRPD diffraction in FIG. 19 and/or peak assignments of the XRPD diffraction of FIG. 19 in Table 19.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G Isopropyl Acetate, characterized by at least one specific XRPD diffraction peak at about (2θ degrees±0.2) 23.4 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G Isopropyl Acetate, characterized by at least one specific XRPD diffraction peak at about (2θ degrees±0.2) 23.438 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G Isopropyl Acetate, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 7.8, 8.3, 11.4, 13.2 and 23.4 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G Isopropyl Acetate, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 7.803, 8.299, 11.398, 13.18 and 23.438 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G Isopropyl Acetate, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 7.8, 8.3, 9.4, 11.4, 13.2, 16.6, 23.4 and 24.4 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G Isopropyl Acetate, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 7.803, 8.299, 9.361, 11.398, 13.18, 16.64, 23.438 and 24.381 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G Isopropyl Acetate, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 7.8, 8.3, 9.4, 11.4, 12.7, 13.2, 16.6, 18.1, 19.6, 20.0, 21.7, 23.4, 24.4 and 27.8 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G Isopropyl Acetate, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 7.803, 8.299, 9.361, 11.398, 12.7, 13.18, 16.64, 18.099, 19.639, 19.979, 21.738, 23.438, 24.381 and 27.821 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G Isopropyl Acetate which has an XRPD diffraction pattern substantially the same as FIG. 19 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G Isopropyl Acetate which is characterized by XRPD diffraction peaks (2θ degrees±0.2) substantially the same as Table 19 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G Isopropyl Acetate which is characterized by endotherms at about 123.3° C., 221.3° C. and 237.0° C. is provided. In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G Isopropyl Acetate which is characterized by endotherms at about 123.3° C. and 237.0° C. is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G Isopropyl Acetate which is characterized by a DSC scan substantially the same as FIG. 48 is provided.

Certain embodiments provide a process for preparing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G Isopropyl Acetate comprising:

(a) mixing either N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E or amorphous N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine and isopropyl acetate; and

(b) recrystallizing the solid to prepare Form G Isopropyl Acetate.

In certain embodiments, N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E is used in Step (a).

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G Methyl Isobutyl Ketone is provided. In certain embodiments, a substantially pure crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G Methyl Isobutyl Ketone is provided. Form G Methyl Isobutyl Ketone can be distinguished by the XRPD diffraction in FIG. 20 and/or peak assignments of the XRPD diffraction of FIG. 20 in Table 20.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G Methyl Isobutyl Ketone, characterized by at least one specific XRPD diffraction peak at about (2θ degrees±0.2) 23.3 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G Methyl Isobutyl Ketone, characterized by at least one specific XRPD diffraction peak at about (2θ degrees±0.2) 23.28 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G Methyl Isobutyl Ketone, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 7.8, 8.2, 11.2, 16.5 and 23.2 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G Methyl Isobutyl Ketone, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 7.78, 8.217, 11.239, 16.503 and 23.28 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G Methyl Isobutyl Ketone, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 7.8, 8.2, 9.3, 11.2, 13.1, 16.5, 19.9, 21.4, 23.2, 24.6 and 27.8 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G Methyl Isobutyl Ketone, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 7.78, 8.217, 9.298, 11.239, 13.079, 16.503, 19.858, 21.442, 23.28, 24.562 and 27.759 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G Methyl Isobutyl Ketone, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 7.8, 8.2, 9.3, 11.2, 12.3, 12.6, 13.1, 16.5, 19.9, 21.4, 23.2, 23.6, 24.6 and 27.8 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G Methyl Isobutyl Ketone, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 7.78, 8.217, 9.298, 11.239, 12.341, 12.575, 13.079, 16.503, 19.858, 21.442, 23.28, 23.619, 24.562 and 27.759 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G Methyl Isobutyl Ketone which has an XRPD diffraction pattern substantially the same as FIG. 20 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G Methyl Isobutyl Ketone which is characterized by XRPD diffraction peaks (2θ degrees±0.2) substantially the same as Table 20 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G Methyl Isobutyl Ketone which is characterized by endotherms at about 102.2° C., 234.8° C. and 251.4° C. is provided. In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G Methyl Isobutyl Ketone which is characterized by endotherms at about 234.8° C. and 251.4° C. is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G Methyl Isobutyl Ketone which is characterized by a DSC scan substantially the same as FIG. 49 is provided.

Certain embodiments provide a process for preparing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G Methyl Isobutyl Ketone comprising:

(a) mixing either N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E or amorphous N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine and MIBK; and

(b) recrystallizing the solid to prepare Form G Methyl Isobutyl Ketone.

In certain embodiments, N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E is used in Step (a).

Form H

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form H is provided. In certain embodiments, a substantially pure crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form H is provided. Form H can be distinguished by the XRPD diffraction in FIG. 21 and/or peak assignments of the XRPD diffraction of FIG. 21 in Table 21.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form H, characterized by at least one specific XRPD diffraction peak at about (2θ degrees±0.2) 11.2 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form H, characterized by at least one specific XRPD diffraction peak at about (2θ degrees±0.2) 11.18 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form H, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 11.2, 16.1, 19.6, 22.0 and 25.5 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form H, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 11.18, 16.08, 19.58, 22.04 and 25.501 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form H which has an XRPD diffraction pattern substantially the same as FIG. 21 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form H which is characterized by XRPD diffraction peaks (2θ degrees±0.2) substantially the same as Table 21 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form H which is characterized by an endotherm at about 231.6° C. is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form H which is characterized by a DSC scan substantially the same as FIG. 50 is provided.

Certain embodiments provide a process for preparing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form H comprising:

(a) mixing amorphous N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine and MTBE; and

(b) recrystallizing the solid to prepare Form H.

Form I

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form I is provided. In certain embodiments, a substantially pure crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form I is provided. Form I can be distinguished by the XRPD diffraction in FIG. 22 and/or peak assignments of the XRPD diffraction of FIG. 22 in Table 22.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form I, characterized by at least one specific XRPD diffraction peak at about (2θ degrees±0.2) 7.2 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form I, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 7.2, 16.6, 18.3, 22.3 and 23.1 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form I, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 7.2, 16.559, 18.303, 22.282 and 23.101 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form I, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 7.2, 12.1, 16.3, 16.6, 18.3, 19.3, 19.5, 20.6, 22.3 and 23.1 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form I, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 7.2, 12.117, 16.319, 16.559, 18.303, 19.32, 19.54, 20.641, 22.282 and 23.101 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form I which has an XRPD diffraction pattern substantially the same as FIG. 22 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form I which is characterized by XRPD diffraction peaks (2θ degrees±0.2) substantially the same as Table 22 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form I which is characterized by endotherms at about 132.6° C. and 236.3° C. and an exotherm at about 183.3° C. is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form I which is characterized by a DSC scan substantially the same as FIG. 51 is provided.

Certain embodiments provide a process for preparing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form I comprising:

(a) mixing amorphous N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine and xylene; and

(b) recrystallizing the solid to prepare Form I.

Form J

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form J is provided. In certain embodiments, a substantially pure crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form J is provided. Form J can be distinguished by the XRPD diffraction in FIG. 23 and/or peak assignments of the XRPD diffraction of FIG. 23 in Table 23.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form J, characterized by at least one specific XRPD diffraction peak at about (2θ degrees±0.2) 17.0 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form J, characterized by at least one specific XRPD diffraction peak at about (2θ degrees±0.2) 16.963 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form J, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 4.5, 9.0, 17.0, 18.0 and 18.8 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form J, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 4.479, 8.982, 16.963, 18.078 and 18.797 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form J which has an XRPD diffraction pattern substantially the same as FIG. 23 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form J which is characterized by XRPD diffraction peaks (2θ degrees±0.2) substantially the same as Table 23 is provided.

Certain embodiments provide a process for preparing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form J comprising:

(a) mixing either N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E or amorphous N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine and 2-methoxyethanol; and

(b) recrystallizing the solid to prepare Form J.

In certain embodiments, N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E is used in Step (a).

Form K

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form K is provided. In certain embodiments, a substantially pure crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form K is provided. Form K can be distinguished by the XRPD diffraction in FIG. 24 and/or peak assignments of the XRPD diffraction of FIG. 24 in Table 24.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form K, characterized by at least one specific XRPD diffraction peak at about (2θ degrees±0.2) 22.8 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form K, characterized by at least one specific XRPD diffraction peak at about (2θ degrees±0.2) 22.78 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form K, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 15.8, 17.6, 22.8, 23.0 and 25.7 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form K, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 15.797, 17.62, 22.78, 23 and 25.701 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form K, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 13.9, 15.8, 17.6, 19.0, 22.8, 23.0 and 25.7 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form K, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 13.923, 15.797, 17.62, 18.999, 22.78, 23 and 25.701 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form K which has an XRPD diffraction pattern substantially the same as FIG. 24 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form K which is characterized by XRPD diffraction peaks (2θ degrees±0.2) substantially the same as Table 24 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form K which is characterized by endotherms at about 119.3° C., 241.2° C. and 253.4° C. and an exotherm at about 171.6° C. is provided. In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form K which is characterized by endotherms at about 241.2° C. and 253.4° C. and an exotherm at about 171.6° C. is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form K which is characterized by a DSC scan substantially the same as FIG. 52 is provided.

Certain embodiments provide a process for preparing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form K comprising:

(a) mixing either N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E or amorphous N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine and DME; and

(b) recrystallizing the solid to prepare Form K.

In certain embodiments, N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E is used in Step (a).

Form L

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form L is provided. In certain embodiments, a substantially pure crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form L is provided. Form L can be distinguished by the XRPD diffraction in FIG. 25 and/or peak assignments of the XRPD diffraction of FIG. 25 in Table 25.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form L, characterized by at least one specific XRPD diffraction peak at about (2θ degrees±0.2) 17.0 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form L, characterized by at least one specific XRPD diffraction peak at about (2θ degrees±0.2) 16.98 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form L, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 14.9, 17.0, 19.0, 21.1 and 22.5 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form L, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 14.899, 16.98, 18.958, 21.062 and 22.457 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form L which has an XRPD diffraction pattern substantially the same as FIG. 25 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form L which is characterized by XRPD diffraction peaks (2θ degrees±0.2) substantially the same as Table 25 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form L which is characterized by endotherms at about 120.4° C. and 251.6° C. and an exotherm at about 202.3° C. is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form L which is characterized by a DSC scan substantially the same as FIG. 53 is provided.

Certain embodiments provide a process for preparing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form L comprising:

(a) mixing either N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E or amorphous N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine and MeOAc; and

(b) recrystallizing the solid to prepare Form L.

In certain embodiments, N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E is used in Step (a).

Form M

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form M is provided. In certain embodiments, a substantially pure crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form M is provided. Form M can be distinguished by the XRPD diffraction in FIG. 26 and/or peak assignments of the XRPD diffraction of FIG. 26 in Table 26.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form M, characterized by at least one specific XRPD diffraction peak at about (2θ degrees±0.2) 9.0 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form M, characterized by at least one specific XRPD diffraction peak at about (2θ degrees±0.2) 8.982 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form M, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 9.0, 15.1, 20.7, 23.1 and 26.8 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form M, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 8.982, 15.136, 20.738, 23.083 and 26.76 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form M which has an XRPD diffraction pattern substantially the same as FIG. 26 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form M which is characterized by XRPD diffraction peaks (2θ degrees±0.2) substantially the same as Table 26 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form M which is characterized by endotherms at about 124.2° C., 229.0° C., 246.0° C. and 256.0° C. and an exotherm at about 198.4° C. is provided. In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form M which is characterized by endotherms at about 124.2° C. and 246.0° C. and an exotherm at about 198.4° C. is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form M which is characterized by a DSC scan substantially the same as FIG. 54 is provided.

Certain embodiments provide a process for preparing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form M comprising:

(a) mixing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Ethanol and 1:1 THF:water; and

(b) recrystallizing the solid to prepare Form M.

Form N

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form N is provided. In certain embodiments, a substantially pure crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form N is provided. Form N can be distinguished by the XRPD diffraction in FIG. 27 and/or peak assignments of the XRPD diffraction of FIG. 27 in Table 27.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form N, characterized by at least one specific XRPD diffraction peak at about (2θ degrees±0.2) 22.9 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form N, characterized by at least one specific XRPD diffraction peak at about (2θ degrees±0.2) 22.92 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form N, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 15.9, 17.8, 19.2, 22.9 and 25.9 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form N, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 15.88, 17.759, 19.202, 22.92 and 25.881 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form N, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 14.0, 15.9, 17.8, 18.1, 19.2, 22.9 and 25.9 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form N, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 14.02, 15.88, 17.759, 18.08, 19.202, 22.92 and 25.881 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form N which has an XRPD diffraction pattern substantially the same as FIG. 27 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form N which is characterized by XRPD diffraction peaks (2θ degrees±0.2) substantially the same as Table 27 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form N which is characterized by endotherms at about 111.0° C. and 242.4° C. and an exotherm at about 146.1° C. is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form N which is characterized by a DSC scan substantially the same as FIG. 55 is provided.

Certain embodiments provide a process for preparing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form N comprising:

(a) mixing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Ethanol and a solution of 1% sodium carboxymethyl cellulose, 0.1% Tween® in water; and

(b) recrystallizing the solid to prepare Form N.

Form O

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form O is provided. In certain embodiments, a substantially pure crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form O is provided. Form O can be distinguished by the XRPD diffraction in FIG. 28 and/or peak assignments of the XRPD diffraction of FIG. 28 in Table 28.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form O, characterized by at least one specific XRPD diffraction peak at about (2θ degrees±0.2) 11.2 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form O, characterized by at least one specific XRPD diffraction peak at about (2θ degrees±0.2) 11.238 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form O, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 11.2, 16.5, 20.0, 22.2 and 25.6 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form O, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 11.238, 16.52, 19.98, 22.179 and 25.638 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form O which has an XRPD diffraction pattern substantially the same as FIG. 28 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form O which is characterized by XRPD diffraction peaks (2θ degrees±0.2) substantially the same as Table 28 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form O which is characterized by an endotherm at about 245.4° C. is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form O which is characterized by a DSC scan substantially the same as FIG. 56 is provided.

Certain embodiments provide a process for preparing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form O comprising:

(a) mixing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G hemi-Tetrahydrofuran with THF;

(b) creating a solution with the N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine and THF; and

(c) recrystallizing the solid to prepare Form O.

In certain embodiments, the solution in Step (b) is created by heating the mixture of Step (a) to about 50° C.

Form P

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form P is provided. In certain embodiments, a substantially pure crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form P is provided. Form P can be distinguished by the XRPD diffraction in FIG. 29 and/or peak assignments of the XRPD diffraction of FIG. 29 in Table 29.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form P, characterized by at least one specific XRPD diffraction peak at about (2θ degrees±0.2) 23.5 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form P, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 9.9, 13.7, 15.7, 17.7 and 23.5 is provided. In a further embodiment, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form P, characterized by XRPD diffraction peaks at about (2θ degrees±0.2) 9.901, 13.74, 15.662, 17.661 and 23.5 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form P which has an XRPD diffraction pattern substantially the same as FIG. 29 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form P which is characterized by XRPD diffraction peaks (2θ degrees±0.2) substantially the same as Table 29 is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form P which is characterized by endotherms at about 159.2° C., 246.7° C. and 262.2° C. is provided.

In certain embodiments, a crystalline polymorph N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form P which is characterized by a DSC scan substantially the same as FIG. 57 is provided.

Certain embodiments provide a process for preparing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form P comprising:

(a) mixing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G Tetrahydrofuran with water; and

(b) recrystallizing the solid to prepare Form P.

Amorphous

In certain embodiments, amorphous N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine is provided. In certain embodiments, substantially pure amorphous N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine is provided. Amorphous N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine is identified in the XRPD of FIG. 30.

In certain embodiments, amorphous N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine which has an XRPD diffraction pattern substantially the same as FIG. 30 is provided.

In certain embodiments, amorphous N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine which is characterized by an mDSC scan substantially the same as FIG. 58 is provided.

Certain embodiments provide a process for preparing amorphous N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine comprising:

(a) mixing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Ethanol with 3:7 water:THF;

(b) sonicating the solution of Step (a);

(c) freezing and lyophilizing the solution to prepare amorphous N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine.

The invention also includes isotopically-labeled N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine, which is identical, but for the fact that one or more atoms are replaced by an atom having an atomic mass or mass number different from the atomic mass or mass number usually found in nature. Examples of isotopes that can be incorporated into compounds of the invention include isotopes of hydrogen, carbon, nitrogen and oxygen, such as ²H, ³H, ¹³C, ¹⁴C, ¹⁵N, ¹⁸O and ¹⁷O, respectively. The polymorphs described herein, which contain the aforementioned isotopes and/or other isotopes of other atoms are within the scope of this invention. Certain isotopically-labeled compounds of the present invention, for example those into which radioactive isotopes, such as ³H and ¹⁴C are incorporated, are useful in drug and/or substrate tissue distribution assays. Tritiated, i.e., ³H and carbon-14, i.e., ¹⁴C, isotopes are particularly widely used as a result of their ease of preparation and detectability. Further, substitution with heavier isotopes such as deuterium, i.e., ²H, can afford certain therapeutic advantages resulting from greater metabolic stability, for example increased in vivo half-life or reduced dosage requirements and, hence, may be utilized in some particular circumstances. Isotopically labeled salts of the present invention can generally be prepared by carrying out procedures disclosed in WO 03/077914 by substituting a readily available isotopically labeled reagent for a non-isotopically labeled reagent during the preparation, or if desired, using an isotopically labeled sulfuric acid in the preparation of the salt.

Synthesis of Compounds

Compounds described herein may be synthesized by synthetic routes that include processes analogous to those well-known in the chemical arts, particularly in light of the description contained herein. The starting materials are generally available from commercial sources such as Sigma-Aldrich (St. Louis, Mo.), Alfa Aesar (Ward Hill, Mass.), or TCI (Portland, Oreg.), or are readily prepared using methods well known to those skilled in the art (e.g., prepared by methods generally described in Louis F. Fieser and Mary Fieser, Reagents for Organic Synthesis. v. 1-23, New York: Wiley 1967-2006 ed. (also available via the Wiley InterScience® website), or Beilsteins Handbuch der organischen Chemie, 4, Aufl. ed. Springer-Verlag, Berlin, including supplements (also available via the Beilstein online database)).

The synthesis of N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine is described in WO 2007/059257. Generally, N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine may be prepared by coupling (E)-N′-(2-cyano-4-(3-(1-hydroxy-2-methylpropan-2-yl)thioureido)phenyl)-N,N-dimethylformimidamide with 4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylaniline in isopropyl acetate:acetic acid (65:35 v/v) at 45° C. to yield 1-(4-((4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)amino)quinazolin-6-yl)-3-(1-hydroxy-2-methylpropan-2-yl)thiourea. The 1-(4-((4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)amino)quinazolin-6-yl)-3-(1-hydroxy-2-methylpropan-2-yl)thiourea may then be agitated in tetrahydrofuran under basic conditions (2.5N NaOH), followed by the addition of p-toluenesulfonyl chloride. Water may then be charged to yield N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine as a mixture of polymorphs (generally a mixture containing one or more of Form C, Form G hemi-THF, Form G mono-THF, Form M or Form P). The final crystallizations or isolations will determine the polymorphic form, which are further detailed in the Examples section.

For a more detailed description of the individual reaction steps, see the Examples section below. Those skilled in the art will appreciate that other synthetic routes may be used to synthesize the compounds.

Administration and Pharmaceutical Formulations

The compounds described herein may be administered by any convenient route appropriate to the condition to be treated. Suitable routes include oral, parenteral (including subcutaneous, intramuscular, intravenous, intraarterial, intradermal, intrathecal and epidural), transdermal, rectal, nasal, topical (including buccal and sublingual), ocular, vaginal, intraperitoneal, intrapulmonary and intranasal.

The compounds may be administered in any convenient administrative form, e.g., tablets, powders, capsules, solutions, dispersions, suspensions, syrups, sprays, suppositories, gels, emulsions, patches, etc. Such compositions may contain components conventional in pharmaceutical preparations, e.g., diluents, carriers, pH modifiers, sweeteners, bulking agents, and further active agents. If parenteral administration is desired, the compositions will be sterile and in a solution or suspension form suitable for injection or infusion.

A typical formulation is prepared by mixing a compound described herein and a carrier or excipient. Suitable carriers and excipients are well known to those skilled in the art and are described in detail in, e.g., Ansel, Howard C., et al., Ansel's Pharmaceutical Dosage Forms and Drug Delivery Systems. Philadelphia: Lippincott, Williams & Wilkins, 2004; Gennaro, Alfonso R., et al. Remington: The Science and Practice of Pharmacy. Philadelphia: Lippincott, Williams & Wilkins, 2000; and Rowe, Raymond C. Handbook of Pharmaceutical Excipients. Chicago, Pharmaceutical Press, 2005. The formulations may also include one or more buffers, stabilizing agents, surfactants, wetting agents, lubricating agents, emulsifiers, suspending agents, preservatives, antioxidants, opaquing agents, glidants, processing aids, colorants, sweeteners, perfuming agents, flavoring agents, diluents and other known additives to provide an elegant presentation of the drug (i.e., a compound described herein or pharmaceutical composition thereof) or aid in the manufacturing of the pharmaceutical product (i.e., medicament).

One embodiment includes a pharmaceutical composition comprising a polymorph or amorphous compound described herein. A further embodiment provides a pharmaceutical composition comprising a polymorph or amorphous compound described herein, together with a pharmaceutically acceptable carrier or excipient.

The amount of the active compound administered will be dependent on the subject being treated, the severity of the disorder or condition, the rate of administration, the disposition of the compound and the discretion of the prescribing physician. However, an effective dosage is in the range of about 0.01 to about 100 mg per kg body weight per day, preferably about 1 to about 35 mg/kg/day, in single or divided doses. For a 70 kg human, this would amount to about 0.7 to 7000 mg/day, preferably about 70 to about 2500 mg/day. In some instances, dosage levels below the lower limit of the aforesaid range may be more than adequate, while in other cases still larger doses may be employed without causing any harmful side effect, provided that such larger doses are first divided into several small doses for administration throughout the day. A unit dosage form such as a tablet or capsule will usually contain, for example 1-1000 mg of active ingredient, and preferably 5-420 mg of active ingredient. Preferably a daily dose in the range of 0.03-6 mg/kg is employed.

Methods of Treatment with Compounds of the Invention

Also provided are methods of treating or preventing disease or condition by administering the pharmaceutical compositions described herein. In one embodiment, a human patient is treated with a pharmaceutical composition described herein in an amount to detectably inhibit ErbB2 activity.

In another embodiment, a method of treating a hyperproliferative disease in a mammal comprising administering a pharmaceutical composition described herein, to the mammal is provided.

In another embodiment, a method of treating or preventing cancer in a mammal in need of such treatment, wherein the method comprises administering to said mammal a pharmaceutical composition described herein. The cancer is selected from breast, ovary, cervix, prostate, testis, genitourinary tract, esophagus, larynx, glioblastoma, neuroblastoma, stomach, skin, keratoacanthoma, lung, epidermoid carcinoma, large cell carcinoma, NSCLC, small cell carcinoma, lung adenocarcinoma, bone, colon, adenoma, pancreas, adenocarcinoma, thyroid, follicular carcinoma, undifferentiated carcinoma, papillary carcinoma, seminoma, melanoma, sarcoma, bladder carcinoma, liver carcinoma and biliary passages, kidney carcinoma, myeloid disorders, lymphoid disorders, hairy cells, buccal cavity and pharynx (oral), lip, tongue, mouth, pharynx, small intestine, colon-rectum, large intestine, rectum, brain and central nervous system, Hodgkin's and leukemia. Another embodiment provides the use of a pharmaceutical composition described herein, in the manufacture of a medicament for the treatment of cancer.

In another embodiment, the cancer is ErbB2 positive.

In another embodiment, the cancer is selected from breast, gastric, biliary, colorectal, brain, lung, NSCLC, pancreatic, head and neck, ovarian and uterine cancer.

In another embodiment, the cancer is selected from breast, gastric, biliary, colorectal, lung, NSCLC, pancreatic, head and neck, ovarian and uterine cancer.

In another embodiment, the cancer is selected from breast, gastric, colorectal, lung and ovarian cancer.

In another embodiment, the cancer is selected from breast, ovarian, gastric and uterine cancer.

In another embodiment, the cancer is selected from breast, gastric, colorectal, NSCLC and ovarian cancer.

In another embodiment, the cancer is selected from breast, lung, pancreatic, colorectal and head and neck cancers.

In another embodiment, the cancer is breast cancer.

In another embodiment, the cancer is gastric cancer.

In another embodiment, the cancer is biliary cancer.

In another embodiment, the cancer is colorectal.

In another embodiment, the cancer is lung cancer.

In another embodiment, the cancer is NSCLC.

In another embodiment, the cancer is pancreatic cancer.

In another embodiment, the cancer is head and neck cancer.

In another embodiment, the cancer is ovarian cancer.

In another embodiment, the cancer is uterine cancer.

In another embodiment, the cancer is brain cancer.

In another embodiment, a method of treating or preventing a disease or disorder modulated by ErbB2, comprising administering to a mammal in need of such treatment an effective amount of a pharmaceutical composition described herein. Examples of such diseases and disorders include, but are not limited to, cancer.

Another embodiment provides a compound described herein in the treatment of disease. In a further embodiment, the disease is a hyperproliferative disease. In a further embodiment, the hyperproliferative disease is cancer.

Another embodiment provides the use of a pharmaceutical composition described herein, in the manufacture of a medicament for the treatment of cancer.

Combination Therapy

The polymorphs and pharmaceutical compositions described herein may be employed alone or in combination with other therapeutic agents for treatment. The compounds described herein may be used in combination with one or more additional drugs, for example an anti-hyperproliferative (or anti-cancer) agent that works through action on a different target protein. The second compound of the pharmaceutical combination formulation or dosing regimen preferably has complementary activities to the compound described herein, such that they do not adversely affect each other. Such molecules are suitably present in combination in amounts that are effective for the purpose intended. The compounds may be administered together in a unitary pharmaceutical composition or separately and, when administered separately this may occur simultaneously or sequentially in any order. Such sequential administration may be close in time or remote in time.

EXAMPLES

For illustrative purposes, the following Examples are included. However, it is to be understood that these Examples do not limit the invention and are only meant to suggest a method of practicing the invention. Persons skilled in the art will recognize that the chemical reactions described may be readily adapted to prepare the compounds or polymorphs described herein, and alternative methods for preparing the compounds or polymorphs are deemed to be within the scope of this invention. For example, the synthesis of the compounds or polymorphs may be successfully performed by modifications apparent to those skilled in the art, e.g., by appropriately protecting interfering groups, by utilizing other suitable reagents known in the art other than those described, and/or by making routine modifications of reaction conditions. Alternatively, other reactions disclosed herein or known in the art will be recognized as having applicability for preparing the compounds or polymorphs described herein. Persons skilled in the art will also recognize that the polymorphs and compositions described may be readily adapted to prepare other polymorphs and compositions, and alternative methods for preparing the polymorphs and compositions, as well as alternative compositions are deemed to be within the scope of this invention.

In the Examples described below, unless otherwise indicated all temperatures are set forth in degrees Celsius. Reagents were purchased from commercial suppliers such as Sigma-Aldrich, Alfa Aesar, or TCI, and were used without further purification unless otherwise indicated. The reactions set forth below were done generally under a positive pressure of nitrogen or argon or with a drying tube (unless otherwise stated) in anhydrous solvents, and the reaction flasks were typically fitted with rubber septa for the introduction of substrates and reagents via syringe. Glassware was oven dried and/or heat dried.

The XRPD analysis was conducted using a Rigaku X-Ray powder diffractometer (model Ultima III) operating with a Cu radiation source at 40 kW, 40 mA. Round standard aluminum sample holders with round zero background, and/or quartz plates were used for sample preparation. The scanning parameters were from a range of about 3-40 degree 2θ (±0.2 degrees) and a continuous scan at a rate of about 2 degrees 2θ/minute. 2θ calibration was performed using a Si standard.

Peak assignment analysis was performed using Materials Data Inc. Jade 7 (Version V5.1.2600) program, which uses a peak search algorithm that is based on the Savitzky-Golay 2nd derivatives combined with the counting statistics of intensity data. The peak search on each crystal form was performed using the following parameters: Parabolic Filter, Peak Threshold=3.0, Intensity Cutoff=0.1%, Background=3/1.0 and Peak Location=Summit. The Tables below include the analysis and are provided with the following approximate data: 20 measured in degrees±0.2 degrees; d measured in angstroms±0.2 angstroms; and relative intensity using peak height to measure height % (H %) in counts per second.

Thermal transition values were measured by differential scanning calorimetry (“DSC”) using a TA Instruments Q1000 DSC on approximately 2-10 mg samples in hermetically sealed aluminum pans with a pin-hole in the lid under an inert nitrogen atmosphere. A heating rate of 10° C./min was used over the 25-275° C. temperature range, and a second, empty aluminum pan was used as a reference.

Glass transition values were measured by modulated differential scanning calorimetry (“mDSC”) using a TA Instruments Q1000 DSC on approximately 2-10 mg samples in hermetically sealed aluminum pans with a pin-hole in the lid under an inert nitrogen atmosphere. A heating rate of 2° C./min with a modulation amplitude of +/−1.3° C. over a period of 60 seconds was used. Samples were analyzed over a 25-150° C. temperature range, and a second, empty aluminum pan was used as a reference.

Example 1 N4-(4-([1,2,4]-Triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form A

Amorphous N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine (20 mg) was added to a vial containing 1:1 EtOH:water (0.5 mL) and stirred for 48 hours at 50° C. The solution was cooled and filtered to yield Form A (Hydrate).

The XRPD scan is shown in FIG. 1 and the peak assignments are in Table 1:

TABLE 1 Relative 2θ d (Å) Intensity 6.86 12.8745 34.5 9.158 9.6484 13.3 9.442 9.3588 18.5 9.723 9.0893 23.1 10.623 8.3213 29.6 10.943 8.0784 21.9 11.416 7.7451 13 12.78 6.921 49.4 13.637 6.4881 35.1 14.959 5.9175 6.7 15.219 5.8169 27.4 16.3 5.4336 48.8 16.94 5.2296 66.1 17.464 5.074 27.1 17.92 4.946 11.9 18.139 4.8867 12.3 18.339 4.8338 13.7 18.745 4.73 7.8 19.138 4.6337 87.5 19.44 4.5624 36.3 20.278 4.3758 100 20.885 4.2499 22 21.16 4.1952 51.3 21.863 4.062 69.2 22.098 4.0194 16.5 22.604 3.9305 8.2 23.139 3.8408 78.8 23.98 3.708 32.7 24.519 3.6276 44.2 25.202 3.5308 72.1 25.901 3.4371 24.4 26.181 3.401 20.2 26.86 3.3166 13.2 27.298 3.2643 31.9 27.733 3.2141 15.6 28.305 3.1504 7.4 28.864 3.0907 7.7 29.339 3.0417 16.6 29.66 3.0095 5.6 30.237 2.9534 5.3 30.642 2.9153 6.1 31.22 2.8626 11.9 32.042 2.791 5.7 32.459 2.7561 6.1 33.061 2.7073 15.9 33.318 2.687 4 33.802 2.6496 4.4 34.46 2.6005 8.9 35.679 2.5144 5.4 37.223 2.4136 3.8 38.178 2.3554 3.5 38.49 2.337 3.9

Example 2 N4-(4-([1,2,4]Triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Methanol Isomorphic Solvate

N4-(4-([1,2,4]Triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E (666.5 mg) was added to a 20 mL scint vial, and MeOH was added (3.0 mL). The suspension was stirred with a magnetic stirrer at room temperature overnight. The suspension was filtered and washed with MeOH (2.0 mL). The solids were dried at 45° C. under vacuum for about 5 hours and then dissolved at reflux in MeOH (50 mL). The solution was allowed to cool and placed in a refrigerator at about 5° C. for 5 days. The resulting solids were collected by filtration after reducing the solvent volume using a rotovap to yield Form B Methanol.

The XRPD scan is shown in FIG. 2 and the peak assignments are in Table 2:

TABLE 2 Relative 2θ d (Å) Intensity 6.881 12.836 6.9 8.46 10.4428 68.3 8.838 9.997 32.9 9.98 8.8555 100 10.297 8.5837 29.3 11.448 7.7236 10.1 12.917 6.8483 9.8 13.438 6.5839 72.7 14.124 6.2653 9.6 15.802 5.6037 39.5 16.243 5.4526 22.9 16.981 5.2171 60.7 17.4 5.0925 23.8 18.042 4.9128 53 18.48 4.7971 25.6 19.72 4.4982 39.9 20.799 4.2672 53.5 21.143 4.1987 37.6 21.622 4.1067 44.3 23.161 3.8371 49.4 23.579 3.7701 18.1 24.72 3.5986 59.5 25.519 3.4877 84.4 27.736 3.2137 6.2 28.278 3.1533 9.8 30.063 2.9701 20.2 32.469 2.7553 6.4 33.173 2.6984 7.6 33.926 2.6402 6.9 34.484 2.5988 7.9

Example 3 N4-(4-([1,2,4]Triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Ethanol Isomorphic Solvate

Absolute ethanol (8.5 L) (10-16 mL/g) was added to a vial containing a mixture of N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine polymorphs (553 g; prepared as described above in Synthesis of Compounds section) and then heated to 70° C. The suspension was cooled to room temperature and agitated for over 12 hours. The suspension was filtered and washed twice with absolute ethanol (2×670 mL). The solids were dried in a vacuum oven at between 55° C. and 60° C. at 40 torr with a nitrogen bleed to yield Form B Ethanol (74.3% yield).

The XRPD scan is shown in FIG. 3 and the peak assignments are in Table 3:

TABLE 3 Relative 2θ d (Å) Intensity 8.358 10.5709 20.9 8.752 10.095 4.6 9.859 8.9643 56.6 10.217 8.6507 7.9 10.748 8.2247 3.1 11.394 7.7598 5.5 13.3 6.6515 50 13.886 6.3722 5.1 15.642 5.6607 25.4 15.94 5.5555 6.5 16.862 5.2539 38.4 17.298 5.1224 19.2 17.94 4.9404 39.8 18.195 4.8718 26.1 18.384 4.822 12.7 19.342 4.5853 5.8 19.602 4.5252 38.8 20.718 4.2838 51.5 21.04 4.219 29.1 21.502 4.1293 46.3 22.402 3.9654 9 22.801 3.897 8 23.08 3.8505 38.5 23.444 3.7915 15.1 24.019 3.702 3.5 24.278 3.6631 4.3 24.621 3.6128 71.9 25.419 3.5013 100 25.785 3.4523 6 26.202 3.3983 12.3 28.275 3.1537 5 28.978 3.0788 4.7 29.94 2.982 15.1 30.764 2.904 4.8 31.196 2.8648 2.1 32.057 2.7897 4.2 32.959 2.7154 5.3 33.635 2.6624 4.6 34.102 2.627 5.8 35.006 2.5612 5.4 35.621 2.5184 5.1 37.3 2.4088 2.5 38.258 2.3506 7.6 38.935 2.3113 2.9 39.578 2.2752 4.3

Example 4 N4-(4-(1,2,41-Triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Isopropyl Alcohol Isomorphic Solvate

IPA (50 mL) was added to a flask containing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form A (5.0 g) and was heated to reflux. Additional IPA (20 mL) was added and continued to heat at reflux. The solution was left stirring and allowed to cool to room temperature and then stored in a refrigerator overnight. The suspension was filtered and dried at room temperature to yield Form B Isopropyl Alcohol.

The XRPD scan is shown in FIG. 4 and the peak assignments are in Table 4:

TABLE 4 Relative 2θ d (Å) Intensity 8.283 10.6656 41.6 8.661 10.2012 7.5 9.78 9.0365 95.7 10.273 8.6041 15.8 11.34 7.7963 11.1 13.201 6.7013 65.7 13.879 6.3757 8.2 15.498 5.7128 24.3 15.9 5.5694 6.1 16.88 5.2482 100 17.24 5.1394 15.1 17.899 4.9515 88 18.378 4.8237 25.8 19.259 4.6049 34.5 19.542 4.5389 25.2 20.6 4.3081 97.5 21.202 4.1872 48.1 21.48 4.1336 33.8 22.2 4.0011 7.8 22.981 3.8669 48 23.38 3.8017 10.8 24.198 3.675 45.9 24.582 3.6185 48.2 25.082 3.5475 67.8 25.362 3.5089 66.2 25.802 3.4501 7.3 26.239 3.3937 9.2 27.981 3.1862 4.9 29.879 2.988 21.5 31.884 2.8045 4.3 32.977 2.714 8.3 34.024 2.6329 6.6 34.985 2.5627 6 35.618 2.5186 6.9 36.354 2.4693 5.5 36.866 2.4361 3.9 38.082 2.3611 5.5

Example 5 N4-(4-([1,2,4]-Triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Acetonitrile Isomorphic Solvate

ACN (4 mL) was added to a 20 mL scint vial containing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E (647.9 mg), and the suspension was stirred magnetically at room temperature overnight. The suspension was filtered and washed with ACN (2 mL). The solids were dried at 45° C. under vacuum for about 5 hours to yield Form B Acetonitrile.

The XRPD scan is shown in FIG. 5 and the peak assignments are in Table 5:

TABLE 5 Relative 2θ d (Å) Intensity 8.46 10.4428 43.2 8.818 10.0203 15.3 9.98 8.8559 95.3 10.899 8.1114 8.3 13.46 6.5729 55.5 14.163 6.2484 9.6 15.82 5.5973 18.1 16.921 5.2357 56.3 17.442 5.0805 31.3 18.12 4.8916 46.4 18.438 4.808 28.4 19.426 4.5657 5.8 19.842 4.471 35 20.821 4.2629 30.4 21.239 4.1798 35.2 21.741 4.0844 50.1 22.64 3.9243 11.3 23.319 3.8116 38.5 24.899 3.5731 61.5 25.661 3.4687 100 26.464 3.3653 18.7 28.283 3.1528 6.3 30.16 2.9607 16.6 31.946 2.7992 3.8 32.438 2.7579 4.8 33.042 2.7088 7.2 33.944 2.6389 9 34.539 2.5947 6.8

Example 6 N4-(4-([1,2,4]Triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Acetone Isomorphic Solvate

Acetone (1 mL) was added to a 20 mL scint vial containing amorphous N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine (113.0 mg), and the suspension was stirred with a magnetic stirrer at room temperature for about 2 hours. N4-(4-([1,2,4]Triazolo[1,5-c]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E (503.5 mg) and acetone (2 mL) were added, and the suspension was magnetically stirred at room temperature overnight. The suspension was filtered and washed with acetone (2 mL). The solids were dried at 45° C. under vacuum for about 5 hours. The solids were slurried at reflux in acetone (100 mL), allowed to cool and stored in a refrigerator at about 5° C. for over 5 days. The solvent was removed by rotovap, and the solids were collected by filtration to yield Form B Acetone.

The XRPD scan is shown in FIG. 6 and the peak assignments are in Table 6:

TABLE 6 Relative 2θ d (Å) Intensity 5.785 15.2648 7.3 8.378 10.5448 45.5 8.678 10.1814 11.3 9.936 8.8948 100 10.342 8.547 10.7 10.778 8.202 3.7 11.481 7.7015 15.6 13.041 6.7832 40.3 13.378 6.613 27.8 14.12 6.267 8.3 15.461 5.7265 12.4 16.119 5.4942 5.3 17.02 5.2052 70.8 17.98 4.9295 49.9 18.478 4.7977 27.5 19.068 4.6506 3.9 19.758 4.4897 37.6 20.302 4.3706 31.7 20.759 4.2754 27.2 21.041 4.2188 33 21.821 4.0698 32.2 22.481 3.9518 18 23.14 3.8406 18.6 23.498 3.783 35.8 24.679 3.6045 60.2 25.52 3.4875 85.2 26.312 3.3843 5 26.641 3.3434 6.1 28.119 3.1709 7.7 28.985 3.0781 3.8 30.061 2.9703 15.2 32.099 2.7862 4 33.016 2.7109 3.9 33.757 2.653 3.9

Example 7 N4-(4-([1,2,4]Triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Dichloromethane Isomorphic Solvate

DCM (1 mL) was added to a 20 mL scint vial containing amorphous N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine (181.7 mg), and the suspension was stirred with a magnetic stirrer at room temperature for about 2 hours. N4-(4-([1,2,4]Triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E (506.3 mg) and DCM (2 mL) were added, and the suspension was magnetically stirred at room temperature overnight. The suspension was filtered and washed with DCM (2 mL). The solids were dried at 45° C. under vacuum for about 5 hours. The solids were slurried at reflux in DCM (5 mL), allowed to cool and stored in a refrigerator at about 5° C. for over 5 days. The solids were collected by filtration to yield Form B Dichloromethane.

The XRPD scan is shown in FIG. 7 and the peak assignments are in Table 7:

TABLE 7 Relative 2θ d (Å) Intensity 7.96 11.0985 28 8.439 10.4697 55.9 8.817 10.0216 12.6 9.517 9.2861 19 9.977 8.8582 84.5 10.265 8.6109 29.3 11.47 7.7085 18.5 12.579 7.0311 21.8 13.381 6.6116 88.6 15.796 5.6059 32.4 16.918 5.2364 100 17.438 5.0814 37.3 18.041 4.9128 57.4 18.34 4.8335 45.8 19.336 4.5867 18.1 19.899 4.4582 48 20.738 4.2797 81.9 21.161 4.1951 38.9 21.802 4.0732 44.8 23.46 3.789 48.8 24.779 3.5902 72.2 25.641 3.4715 75.3 26.441 3.3681 16.4 28.27 3.1543 16.5 30.319 2.9456 16.3 34.536 2.5949 11.3

Example 8 N4-(4-([1,2,4]Triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Tetrahydrofuran Isomorphic Solvate

THF (4 mL) was added to a vial containing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G mono-Tetrahydrofuran (300 mg), and the contents were agitated at room temperature. The contents were filtered and washed with THF (3×0.8 mL). The solids were dried in a vacuum oven at 45° C. with a nitrogen bleed to yield Form B Tetrahydrofuran (91.8% yield).

The XRPD scan is shown in FIG. 8 and the peak assignments are in Table 8:

TABLE 8 Relative 2θ d (Å) Intensity 8.262 10.6932 33 8.679 10.1799 15.5 9.819 9.0002 84.9 10.718 8.2473 7.1 13.38 6.6123 61.1 13.96 6.3388 12.5 15.72 5.6327 22.4 16.7 5.3042 65.3 17.179 5.1575 26.2 17.92 4.9459 70.9 19.541 4.5392 30.8 20.58 4.3121 21.6 21.4 4.1489 58.7 22.92 3.877 40.7 24.66 3.6072 64 25.44 3.4984 100 26.079 3.414 20.6 28.28 3.1532 4.1 29.84 2.9918 13.8 32.237 2.7746 3.9 32.781 2.7298 5.2 33.7 2.6574 7.7 35.262 2.5432 7.2 37.296 2.4091 2.6 38.335 2.3461 3.8 39.4 2.2851 2.2

Example 9 N4-(4-([1,2,4]-Triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Anhydrous

N4-(4-([1,2,4]Triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Ethanol (1.10 g) was placed in a watch glass, which was then placed in an oven at 100° C. with nitrogen flowing through it. The solid was removed after 5 days and placed in a 25 mL round bottom flask and heated to 200° C. under high vacuum for 1 hour. The sample was again placed in the oven at 200° C. under high vacuum for 3 hours. The solids were collected in a 20 mL scint vial to yield Form B Anhydrous.

The XRPD scan is shown in FIG. 9 and the peak assignments are in Table 9:

TABLE 9 Relative 2θ d (Å) Intensity 8.44 10.4679 37.8 8.855 9.9777 18.7 9.938 8.8932 100 10.902 8.1086 9 12.642 6.9962 2.4 13.641 6.4863 54.2 14.28 6.1975 12.4 16.016 5.5294 25.5 16.841 5.2602 43.8 17.099 5.1813 37.1 17.439 5.0813 27 18.1 4.8971 54.1 18.42 4.8127 22.9 19.697 4.5035 25.8 20.222 4.3877 5.8 20.704 4.2867 11.1 21.22 4.1835 42.8 21.498 4.1301 45.6 22.56 3.9381 4.1 23 3.8636 24.7 23.538 3.7766 14.6 24.901 3.5729 35.1 25.541 3.4848 60.4 26.159 3.4038 13.6 28.078 3.1754 1.7 28.558 3.1231 2.9 29.213 3.0545 2.4 29.879 2.9879 9.4 30.242 2.9529 3.5 31.379 2.8485 2.6 31.845 2.8079 2.3 32.416 2.7597 2.9 32.944 2.7166 3.3 33.943 2.6389 4.1 34.657 2.5862 1.7 35.463 2.5292 5.5 37.385 2.4035 1.9 38.582 2.3316 2.7 39.558 2.2764 1.3

Example 10 N4-(4-([1,2,4]Triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form C

2-Methoxyethanol (200 mL) was added to a 500 mL Erlenmeyer flask containing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form A (15.11 g), and the solution was heated to 50° C. with stirring. The flask was cooled to room temperature, and the volume was reduced to about 50 mL by rotovap. The flask was allowed to stand for 2 hours. EtOH (200 mL) was added, and the contents of the flask were stirred, filtered and washed with EtOH (3×15 mL). The solid was dried at 50° C. under vacuum overnight to yield Form C (Anhydrous).

The XRPD scan is shown in FIG. 10 and the peak assignments are in Table 10:

TABLE 10 Relative 2θ d (Å) Intensity 5.04 17.52 100 7.159 12.3378 69.6 10.159 8.7004 68.2 11.376 7.772 16.2 11.902 7.4299 29.8 12.16 7.2724 9.2 12.977 6.8163 17.9 14.435 6.1313 76.8 15.301 5.786 99.8 15.717 5.6338 66.7 16.121 5.4936 29.8 16.719 5.2985 43.3 17.501 5.0632 76.3 18.059 4.908 36.8 18.437 4.8084 88.4 18.902 4.6911 90.7 19.638 4.5168 74.1 20.479 4.3333 30.7 21.08 4.2111 42.2 21.437 4.1418 42.3 21.74 4.0848 27.8 22.34 3.9763 52.8 22.878 3.884 24.6 23.779 3.7389 32 24.181 3.6776 64.8 24.58 3.6188 33.1 25.262 3.5226 11 25.679 3.4663 11 26.096 3.4119 29.8 26.809 3.3228 5.8 27.18 3.2783 19.1 27.675 3.2208 8.4 27.88 3.1975 8.6 28.417 3.1383 16 28.599 3.1187 16.3 30.021 2.9742 7.6 31.113 2.8722 5.5 31.863 2.8063 6.6 32.674 2.7385 5.9 33.339 2.6853 17.7 34.234 2.6171 6 34.878 2.5703 8.6 37.442 2.4 8.9

Example 11 N4-(4-([1,2,4]Triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Ethyl Acetate Isomorphic Solvate

EtOAc (2.0 mL) was added to a 4 mL vial containing amorphous N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine (394 mg), and the contents were stirred overnight at room temperature. The solids were dried under a stream of nitrogen to yield Form D Ethyl Acetate.

The XRPD scan is shown in FIG. 11 and the peak assignments are in Table 11:

TABLE 11 Relative 2θ d (Å) Intensity 5.596 15.7789 13.5 6.741 13.1015 11 7.959 11.0998 100 9.139 9.669 3.4 9.798 9.0196 38.7 11.321 7.8099 35.5 12.66 6.9863 61.3 13.917 6.3581 33.9 16.099 5.501 54.8 17.118 5.1757 48.3 18.017 4.9194 33.9 18.937 4.6825 6.4 19.761 4.489 47.4 21.379 4.1529 28.2 22.139 4.012 23.9 22.557 3.9386 7.6 22.93 3.8753 5.9 23.599 3.7669 38.3 24.241 3.6686 18.7 25.34 3.512 13.7 25.66 3.4689 15.5 27.52 3.2385 33.6 28.142 3.1684 5.4 28.724 3.1054 4.6 29.023 3.0742 4.7 29.359 3.0397 4.4 30.045 2.9719 2.7 31.56 2.8326 4.8 32.093 2.7867 3.8 32.701 2.7363 2.7 33.243 2.6929 3.5 37.161 2.4175 2.7

Example 12 N4-(4-([1,2,4]Triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Dioxane Isomorphic Solvate

Dioxane (600 μL) was added to a vial containing amorphous N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine (90 mg), and the contents were allowed to stir overnight. The solids were filtered and dried at room temperature to yield Form D Dioxane.

The XRPD scan is shown in FIG. 12 and the peak assignments are in Table 12:

TABLE 12 Relative 2θ d (Å) Intensity 7.822 11.294 99.1 9.34 9.4615 30.3 9.759 9.0562 33.4 11.139 7.9369 98.7 12.5 7.0753 86.2 13.378 6.6132 16.1 13.763 6.429 32.4 15.841 5.5899 17 16.461 5.3808 32.6 17.135 5.1708 43.3 17.703 5.0059 35 19.54 4.5394 100 21.062 4.2146 84.1 21.901 4.0551 28 23.139 3.8409 89.2 24.022 3.7016 53 25.202 3.5309 33.4 27.179 3.2784 62.6 28.859 3.0912 18.6 37.578 2.3916 9.4 39.493 2.2799 9.1

Example 13 N4-(4-([1,2,4]-Triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Acetone Isomorphic Solvate

Acetone (300 μL) was added to a vial containing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E (100 mg), and the contents were allowed to stir overnight. The solids were filtered and dried at room temperature to yield Form D Acetone.

The XRPD scan is shown in FIG. 13 and the peak assignments are in Table 13:

TABLE 13 Relative 2θ d (Å) Intensity 5.656 15.6134 10.8 7.999 11.0445 100 8.603 10.2695 2.9 9.856 8.9671 43.6 11.359 7.7837 33.7 12.681 6.9748 48.3 13.923 6.3555 55.6 16.101 5.5003 59.5 17.14 5.169 83.3 17.625 5.0278 6.4 18 4.9241 36.7 18.941 4.6815 13.8 19.761 4.489 56.4 20.581 4.3121 7.2 21.378 4.153 63 22.103 4.0185 38.1 22.541 3.9413 13.9 22.9 3.8804 16 23.561 3.7729 71.5 24.259 3.6659 42.6 25.063 3.5501 5.8 25.339 3.5121 21.6 25.622 3.474 29.3 26.981 3.3019 11.2 27.482 3.2429 82.1 28.122 3.1705 15.5 28.723 3.1056 13.1 29.002 3.0763 10.1 29.339 3.0417 11.7 29.848 2.991 4.3 30.2 2.9569 4.1 31 2.8824 3.8 31.539 2.8344 5.1 32.041 2.7911 10.8 32.662 2.7395 9.3 33.218 2.6949 7.6 33.611 2.6642 3.6 35.201 2.5474 4.1 35.675 2.5147 3.1 37.117 2.4203 8 39.058 2.3043 6

Example 14 N4-(4-([1,2,4]Triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form D Propyl Acetate Isomorphic Solvate

Propyl acetate (400 μL) was added to a vial containing N4-(4-[1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E (50 mg), and the contents were allowed to stir overnight. The solids were filtered and dried at room temperature to yield Form D Propyl Acetate.

The XRPD scan is shown in FIG. 14 and the peak assignments are in Table 14:

TABLE 14 Relative 2θ d (Å) Intensity 5.074 17.4026 6.3 5.623 15.7043 8.4 7.189 12.2862 5.2 7.999 11.0438 100 9.839 8.9821 43.1 10.158 8.7009 7.5 11.362 7.7816 32.3 12.719 6.9541 68.2 13.903 6.3648 39.7 14.381 6.1539 6.4 15.701 5.6395 10.3 16.121 5.4937 68.2 17.16 5.1633 84.4 17.574 5.0423 8.5 18.021 4.9183 38.5 18.419 4.813 9.8 18.96 4.677 19.2 19.782 4.4844 68.7 20.65 4.2977 7.7 21.42 4.1449 38.6 22.201 4.0008 33.5 22.596 3.9318 16.5 22.92 3.8771 15.1 23.62 3.7637 61.7 24.28 3.6629 45.7 25.379 3.5066 26.7 25.681 3.466 26.4 27.579 3.2317 54.1 28.825 3.0948 9.1 29.137 3.0623 10.8 29.365 3.0391 6.1 31.503 2.8376 8.4 32.019 2.793 5.2 32.699 2.7364 6 33.283 2.6898 7.8 37.179 2.4164 4.6 39.104 2.3017 5

Example 15 N4-(4-([1,2,4]-Triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E

N4-(4-([1,2,4]Triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine was synthesized from 1-(4-((4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)amino)quinazolin-6-yl)-3-(1-hydroxy-2-methylpropan-2-yl)thiourea (322 g) in THF (3 L) at 0° C. Water (10 L) was added, and the solution was allowed to stir for 1 hour, at which point the material oiled out. The organics were then extracted into ethyl acetate (3×5000 mL), combined and washed with water (2×5000 mL) and brine (2×5000 mL). The organics were dried by rotoevaporation, and the material was concentrated to an oil. The oil was observed to solidify at room temperature to yield Form E.

The XRPD scan is shown in FIG. 15 and the peak assignments are in Table 15:

TABLE 15 Relative 2θ d (Å) Intensity 8.659 10.204 44.5 9.353 9.4482 38.4 10 8.8382 4.8 11.904 7.4284 27.3 12.416 7.123 14.8 12.923 6.8451 19.3 15.36 5.7638 11 16.06 5.5143 100 16.338 5.421 16.6 16.709 5.3015 2.9 16.918 5.2363 8 17.457 5.0759 4.9 18.03 4.9158 3.8 18.4 4.8179 8.1 19.021 4.6621 11.2 19.619 4.5212 19.4 20.08 4.4186 23.4 20.656 4.2965 3.8 21.296 4.1689 18.1 21.62 4.107 12.6 22.179 4.0047 1.8 22.821 3.8935 18.4 23.739 3.745 43.6 24.358 3.6512 6.7 24.94 3.5674 2.7 25.295 3.518 3 25.459 3.4958 2.5 26.106 3.4107 3.5 27.035 3.2955 3.6 27.8 3.2065 6.8 28.297 3.1513 15.4 29.237 3.0521 2.3 30.716 2.9084 2.7 31.799 2.8118 4.9 32.507 2.7522 1.7 36.658 2.4495 1.9 39.055 2.3045 1.5

Example 16 N4-(4-([1,2,4]-Triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form F

Ethyl acetate (5 mL) was added to a vial containing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E (1 g), and the contents were stirred for 48 hours. The solid was filtered and dried overnight in a vacuum oven at room temperature to yield Form F (Ethyl Acetate solvate).

The XRPD scan is shown in FIG. 16 and the peak assignments are in Table 16:

TABLE 16 Relative 2θ d (Å) Intensity 6.981 12.6512 8.2 7.58 11.6541 15 8.24 10.7212 14.5 9.483 9.3191 12.6 11.04 8.008 4.5 11.498 7.6901 32.5 12.321 7.178 9.5 12.859 6.8787 12.4 13.633 6.49 2.5 13.897 6.3675 2.7 14.899 5.9413 41.3 15.906 5.5673 4.1 16.56 5.3487 100 16.92 5.2357 50.2 18.502 4.7916 14.9 19.098 4.6433 87.8 19.62 4.5209 32.4 20.663 4.2952 12.9 21.18 4.1914 35.4 21.633 4.1046 8 22.24 3.994 22.1 22.537 3.942 35.1 23.004 3.8631 16.3 23.361 3.8047 9.3 23.996 3.7056 24.8 24.423 3.6417 6.6 24.942 3.567 26 25.379 3.5067 13.8 26.418 3.371 6.7 26.738 3.3314 4.4 27.34 3.2594 25.3 27.913 3.1938 4.3 28.38 3.1423 5.4 29.02 3.0744 15.7 29.915 2.9844 4.6 31.941 2.7996 4.5 33.417 2.6793 4.5 35.201 2.5475 4.8 36.042 2.4899 2.8

Example 17 N4-(4-([1,2,4]Triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G hemi-Tetrahydrofuran Isomorphic Solvate

THF:water (2 mL, 20:80) was added to a vial containing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G mono-Tetrahydrofuran (100 mg), and the contents were stirred at room temperature overnight. The contents were then heated to 40° C. and stirred overnight. The solids were filtered and collected to yield Form G hemi-Tetrahydrofuran.

The XRPD scan is shown in FIG. 17 and the peak assignments are in Table 17:

TABLE 17 Relative 2θ d (Å) Intensity 5.148 17.1528 3.5 5.521 15.995 13.1 7.719 11.4438 91.4 8.018 11.0172 28.3 9.379 9.4216 28.6 11.102 7.963 42.1 12.281 7.201 49.9 12.737 6.9445 17.6 13.263 6.67 13.8 13.897 6.3673 3.3 14.097 6.2772 5.9 15.558 5.6909 20.2 16.142 5.4863 16.5 16.544 5.3541 32.6 16.955 5.2253 10.4 17.26 5.1336 16.1 17.519 5.0583 17.4 18.096 4.8982 16.6 18.837 4.7072 15.6 19.26 4.6047 16.8 19.72 4.4982 19.6 20.26 4.3795 22.6 20.645 4.2989 5.3 21.022 4.2225 30.3 21.243 4.1792 22.2 21.865 4.0617 7.5 22.6 3.9311 9.2 23.079 3.8507 100 23.359 3.8052 34.1 24.099 3.69 55.8 24.48 3.6333 11.5 24.934 3.5683 6.3 25.222 3.5281 10.7 26.839 3.3191 17.6 27.282 3.2662 16.1 27.503 3.2404 37.7 28.281 3.1531 6.7 28.52 3.1272 7.7 29.062 3.07 6.3 29.814 2.9943 9 31.297 2.8558 4.3 32.39 2.7619 5.4

Example 18 N4-(4-([1,2,4]Triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G mono-Tetrahydrofuran Isomorphic Solvate

THF (150 mL) was added to a flask containing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form A (5.17 g), and the contents were heated to reflux until all of the solids dissolved. The heat was removed, and the flask was allowed to cool to room temperature with stirring overnight. The volume was reduced to about 50 mL by nitrogen evaporation. The flask was stored in a refrigerator overnight. The contents of the flask were filtered and washed with THF (2×10 mL). The solids were dried at 50° C. under vacuum overnight to yield Form G mono-Tetrahydrofuran.

The XRPD scan is shown in FIG. 18 and the peak assignments are in Table 18:

TABLE 18 Relative 2θ d (Å) Intensity 5.522 15.9921 20.2 7.72 11.4432 87.8 8.003 11.039 45.6 9.417 9.3841 39.8 11.137 7.9379 60.5 12.401 7.1321 58.8 12.734 6.946 24.7 13.281 6.6612 16.6 13.825 6.4002 4.9 14.083 6.2837 9.5 15.559 5.6908 19.6 16.159 5.4806 19.6 16.599 5.3365 44.8 16.961 5.2233 18.7 17.318 5.1164 27.2 17.54 5.0521 18.3 18.14 4.8864 22.5 18.858 4.702 19.9 19.3 4.5952 17.8 19.739 4.4939 27.1 20.257 4.3802 21.8 21.017 4.2235 40.5 21.24 4.1796 29.3 22.601 3.9309 12.2 23.022 3.8601 100 23.397 3.799 38.6 24.042 3.6985 77.4 24.419 3.6423 11.8 25.222 3.5281 9.6 26.82 3.3214 23.9 27.482 3.2429 38.2 28.463 3.1333 10.5 29.06 3.0703 8.2 29.8 2.9957 8.5 30.664 2.9132 5.6 32.382 2.7625 7

Example 19 N4-(4-([1,2,4]-Triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G Isopropyl Acetate Isomorphic Solvate

Isopropyl acetate (5 mL) was added to a vial containing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E (500 mg), and the contents were stirred at room temperature for 48 hours. The contents were filtered and dried overnight in a vacuum oven at room temperature to yield Form G Isopropyl Acetate.

The XRPD scan is shown in FIG. 19 and the peak assignments are in Table 19:

TABLE 19 Relative 2θ d (Å) Intensity 5.601 15.765 18.2 7.803 11.3215 61.8 8.299 10.6452 55.3 9.361 9.4403 52.3 9.841 8.9804 11.8 11.398 7.7568 59.8 12.7 6.9646 49.6 13.18 6.712 52.7 14.026 6.3092 5 15.961 5.5483 34.8 16.64 5.3232 52.6 17.121 5.1748 28.6 17.457 5.076 10.6 18.099 4.8973 36.6 18.655 4.7526 22.1 19.04 4.6573 17.9 19.639 4.5166 38.4 19.979 4.4405 49.1 20.58 4.3122 26.8 21.323 4.1636 17.8 21.738 4.0851 46.5 22.58 3.9345 27.7 23.438 3.7924 100 23.739 3.745 32.1 24.381 3.6478 51.6 24.737 3.5961 34.4 25.084 3.5472 12.2 26.605 3.3478 10.1 27.821 3.2042 46.9 29.303 3.0454 6.8 29.899 2.986 14.5 31.171 2.867 5.3 31.641 2.8255 8.5 32.799 2.7283 5.4 33.295 2.6888 6 38.788 2.3197 6.4

Example 20 N4-(4-([1,2,4]Triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G Methyl Isobutyl Ketone Isomorphic Solvate

MIBK (400 μL) was added to a vial containing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E (50 mg), and the suspension was stirred at room temperature overnight. The solids were filtered and dried to yield Form G Methyl Isobutyl Ketone.

The XRPD scan is shown in FIG. 20 and the peak assignments are in Table 20:

TABLE 20 Relative 2θ d (Å) Intensity 4.824 18.302 12.3 5.638 15.6616 26.6 7.78 11.3544 95.5 8.217 10.7513 58.1 9.298 9.5039 50.4 11.239 7.8665 72.1 11.515 7.6787 13.8 12.341 7.1661 46.1 12.575 7.0334 46.9 13.079 6.7636 50.2 13.437 6.5842 19 14.338 6.1723 16.4 15.715 5.6346 16.1 16.221 5.4599 29.8 16.503 5.3672 69.4 16.993 5.2135 28.4 17.415 5.0881 25.4 17.961 4.9347 29.2 18.503 4.7914 32.5 19.036 4.6585 24.8 19.35 4.5835 21.3 19.66 4.512 22.7 19.858 4.4674 52 20.52 4.3247 24 21.221 4.1834 27.4 21.442 4.1408 50 21.641 4.1032 28.3 22.305 3.9825 25.8 22.644 3.9236 16.1 23.28 3.8178 100 23.619 3.7637 46.7 24.562 3.6214 56.6 24.997 3.5593 23.7 27.477 3.2435 27.1 27.759 3.2111 50.5 28.302 3.1508 23.6 29.898 2.9862 17.4 31.866 2.806 14.3 33.135 2.7014 10.4

Example 21 N4-(4-([1,2,4]Triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form H

MTBE (600 μL) was added to a vial containing amorphous N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine (90 mg), and the contents were stirred at room temperature overnight. The solids were filtered and dried at room temperature to yield Form H (Methyl tert-Butyl Ether solvate).

The XRPD scan is shown in FIG. 21 and the peak assignments are in Table 21:

TABLE 21 Relative 2θ d (Å) Intensity 7.38 11.9685 14.9 9.246 9.5576 11.1 11.18 7.908 100 12.701 6.9638 12.2 16.08 5.5075 55.8 18.696 4.7422 9.9 19.58 4.5302 30.1 22.04 4.0298 73.9 24.741 3.5955 21.7 25.501 3.4901 29.6 26.738 3.3314 13.3 27.86 3.1997 11.7 28.198 3.1621 7.5 31.901 2.803 7.3 33.618 2.6637 7.8

Example 22 N4-(4-([1,2,4]Triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form I

Xylene (600 μL) was added to a vial containing amorphous N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine (90 mg), and the contents were stirred at room temperature overnight. The solids were filtered and dried at room temperature to yield Form I (Xylenes solvate).

The XRPD scan is shown in FIG. 22 and the peak assignments are in Table 22:

TABLE 22 Relative 2θ d (Å) Intensity 4.318 20.4483 11.8 7.2 12.268 100 8.065 10.9535 33.7 8.421 10.4921 19.4 9.603 9.2023 8.9 10.343 8.5459 34.1 11.101 7.9636 33.8 12.117 7.2984 37.7 12.664 6.9844 20.2 13.057 6.7751 17.4 14.961 5.9169 22.7 15.222 5.816 28.1 16.319 5.4272 35.3 16.559 5.3491 64.2 16.798 5.2735 27.6 17.578 5.0414 19.1 18.303 4.8434 59.5 18.904 4.6907 24.3 19.32 4.5905 39.8 19.54 4.5394 39.6 20.261 4.3794 33.3 20.641 4.2997 35.9 21.082 4.2107 27.8 22.282 3.9866 40.3 23.101 3.8471 44 23.942 3.7137 21.6 25.134 3.5403 7.6 25.541 3.4847 20.7 26.341 3.3807 27.7 27.198 3.2761 9.2 27.395 3.2529 9.6 27.667 3.2216 7.4 29.58 3.0174 9.7

Example 23 N4-(4-([1,2,4]Triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form J

2-Methoxyethanol (4 mL) was added to a 20 mL scint vial containing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E (1013.25 mg), and the contents were stirred at room temperature for about 6 hours. The contents were filtered and washed with 2-methoxyethanol (2×10 mL). The solids were dried on the filter at room temperature for about 1 hour to yield Form J (2-Methoxyethanol solvate).

The XRPD scan is shown in FIG. 23 and the peak assignments are in Table 23:

TABLE 23 Relative 2θ d (Å) Intensity 4.019 21.9675 4.5 4.479 19.7134 53.2 6.777 13.0322 25.4 8.982 9.838 49.8 10.358 8.5335 3.2 11.874 7.4469 2.4 12.083 7.319 4.5 12.724 6.9517 18.9 13.521 6.5434 29.6 14.463 6.1192 4.7 15.014 5.896 6.2 16.963 5.2228 100 18.078 4.903 88.2 18.797 4.7169 39.4 19.317 4.5912 11.4 19.858 4.4673 32.5 20.156 4.4019 25.4 20.838 4.2595 23.3 21.761 4.0808 31.2 22.118 4.0158 9.4 22.682 3.9171 12.9 23.298 3.8149 19 24.062 3.6955 15.2 24.658 3.6076 16.7 24.957 3.5649 16.9 25.664 3.4683 21.4 26.167 3.4028 6.4 26.734 3.3319 6 26.998 3.2999 4.1 27.299 3.2642 16.3 27.497 3.2411 9.8 27.638 3.2249 6.9 28.779 3.0996 2.7 30.02 2.9742 4.9 31.106 2.8729 3.1 32.043 2.791 10.5 33.279 2.69 4.5 33.604 2.6648 4.6 34.407 2.6044 4.4 35.097 2.5548 3.2 36.444 2.4634 4.4 36.655 2.4497 2.8 37.891 2.3726 2.2 38.179 2.3553 2.9 38.459 2.3388 2.3 39.413 2.2844 2.2

Example 24 N4-(4-([1,2,4]-Triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form K

DME (4 mL) was added to a 20 mL scint vial containing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E (939.4 mg), and the contents were stirred at room temperature for about 6 hours. The contents were filtered and washed with DME (2×10 mL). The solids were dried at 50° C. under vacuum overnight to yield Form K (Dimethoxyethane solvate).

The XRPD scan is shown in FIG. 24 and the peak assignments are in Table 24:

TABLE 24 Relative 2θ d (Å) Intensity 6.923 12.7574 32.9 8.499 10.3956 8.4 10.137 8.7186 3.2 11.036 8.011 12.5 11.836 7.4712 28.8 12.054 7.3363 4.3 12.743 6.9411 10.2 13.259 6.6723 5.8 13.923 6.3553 38.8 14.775 5.9908 10.3 15.797 5.6056 62.7 16.96 5.2237 20.8 17.16 5.1632 31.8 17.62 5.0293 58.8 17.998 4.9246 34.6 18.482 4.7967 3.2 18.683 4.7455 8 18.999 4.6673 39.5 21.041 4.2187 4.9 21.24 4.1797 9.2 21.796 4.0744 4.8 21.898 4.0555 4.7 22.177 4.0051 4.5 22.78 3.9005 100 23 3.8638 77.9 23.336 3.8088 3.8 23.863 3.7259 3.6 24.205 3.674 7.1 24.503 3.63 8.2 25.269 3.5217 4.2 25.701 3.4635 42.8 27.101 3.2876 27.3 28.26 3.1554 6 28.821 3.0952 5.8 29.258 3.0499 4.2 29.441 3.0314 6.6 29.864 2.9894 4.5 30.444 2.9338 5.6 30.749 2.9054 2.5 31.942 2.7995 5.5 32.94 2.7169 2.8 33.864 2.6449 4.3 35.505 2.5264 2.3 36.018 2.4915 3.3 37.375 2.4041 2.3 38.245 2.3514 2.3 38.876 2.3147 2.4 39.333 2.2888 2.4

Example 25 N4-(4-([1,2,4]Triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form L

MeOAc (400 μL) was added to a vial containing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E (50 mg), and the contents were stirred overnight at room temperature. The solids were filtered and dried to yield Form L (Methyl Acetate solvate).

The XRPD scan is shown in FIG. 25 and the peak assignments are in Table 25:

TABLE 25 Relative 2θ d (Å) Intensity 5.028 17.5604 5.3 6.978 12.657 10.4 7.602 11.6193 13.4 8.301 10.6435 15.1 9.34 9.4614 5.5 9.638 9.1691 3.5 11.523 7.673 22.9 12.281 7.2015 3.5 12.758 6.9332 20.1 14.899 5.9414 64.5 15.463 5.7257 10.4 16.198 5.4675 12.2 16.98 5.2176 100 17.521 5.0575 9.1 18.478 4.7978 12.7 18.958 4.6773 89.8 19.62 4.5211 27.2 20.822 4.2627 16.4 21.062 4.2147 37.3 21.462 4.137 20.3 22.122 4.015 9.2 22.457 3.9558 47.9 23.019 3.8606 15.7 23.661 3.7572 7.4 24.126 3.6859 7.3 24.6 3.6159 16.9 25.7 3.4636 16.9 26.311 3.3845 7.2 27.183 3.2779 17.1 27.819 3.2044 11.7 28.64 3.1144 12.5 29.736 3.002 6.2 30.939 2.888 5.1 31.197 2.8647 4.3 32.037 2.7915 5.7 32.379 2.7627 6.1 32.742 2.7329 4.9 33.764 2.6525 4.5 35.919 2.4981 3.8 38.746 2.3222 3.3

Example 26 N4-(4-([1,2,4]Triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form M

THF:water (0.4 mL, 1:1) was added to a flask containing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Ethanol (50 mg), and the contents were stirred for 24 hours at room temperature. The solids were filtered and dried at room temperature to yield Form M (Tetrahydrofuran:Water solvate) (86% yield).

The XRPD scan is shown in FIG. 26 and the peak assignments are in Table 26:

TABLE 26 Relative 2θ d (Å) Intensity 8.982 9.8379 100 10.375 8.5192 24.7 11.194 7.8982 4.2 13.379 6.6124 13.3 14.422 6.1366 7.7 15.136 5.8487 34.5 15.561 5.6899 26.3 16.057 5.5153 8.5 16.255 5.4484 10.3 17.009 5.2086 3.6 17.383 5.0975 3.7 17.859 4.9625 7.4 18.201 4.8702 23.4 18.54 4.7819 7.5 18.819 4.7115 7.8 20.738 4.2798 47.8 21.395 4.1497 21.8 22.583 3.9341 15.8 23.083 3.8501 68.1 23.455 3.7897 13.6 23.863 3.7259 3.6 24.419 3.6422 4.4 24.715 3.5993 4.2 24.943 3.5669 4.9 25.438 3.4987 3.3 25.822 3.4474 3.8 26.44 3.3683 5.2 26.76 3.3287 29.9 27.301 3.2639 6.8 28.126 3.17 2.9 29.178 3.0581 6 29.459 3.0296 13.8 30.543 2.9245 8.5 32.507 2.7522 3.1 34.461 2.6005 3.3

Example 27 N4-(4-([1,2,4]Triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form N

A solution of 1% NaCMC and 0.1% Tween® in water (2 mL) was added to a vial containing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Ethanol (51.26 mg). The vial was placed on a stir plate and allowed to stir for 2 weeks at room temperature. Solids were collected by filtration and washed with water (2×3 mL). The solids were collected and dried under vacuum at room temperature overnight to yield Form N (Hydrate).

The XRPD scan is shown in FIG. 27 and the peak assignments are in Table 27:

TABLE 27 Relative 2θ d (Å) Intensity 7.04 12.5463 33.6 8.142 10.8505 9.2 8.521 10.3682 15.6 8.902 9.9256 6.9 10.238 8.6335 8.5 11.16 7.9217 14.5 11.941 7.4055 29 12.918 6.8476 9.5 13.36 6.6221 7.4 14.02 6.3115 36.9 14.903 5.9398 9.6 15.88 5.5764 66.7 17.378 5.0988 32.6 17.759 4.9903 53.9 18.08 4.9025 35.3 19.202 4.6185 40.1 21.302 4.1676 11.2 21.895 4.0561 3.6 22.92 3.877 100 24.074 3.6937 4.8 24.701 3.6013 10.9 25.881 3.4398 41.7 27.319 3.2618 29.9 28.401 3.14 8.5 28.999 3.0766 5.5 29.539 3.0216 6 30.041 2.9722 4.9 30.578 2.9213 5.8 32.138 2.7829 5 33.081 2.7057 5.1 34.001 2.6346 4.7 35.623 2.5183 3.8 36.195 2.4797 4.8 37.291 2.4093 2.3

Example 28 N4-(4-([1,2,4]Triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form O

THF (40 g) was added to a vial containing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G hemi-Tetrahydrofuran (3 g), and the contents were agitated at 50° C. The contents were filtered and washed with THF (3×6 mL). Solids were dried in a vacuum oven at 45° C. with a nitrogen bleed to yield Form O (Anhydrous) (45% yield).

The XRPD scan is shown in FIG. 28 and the peak assignments are in Table 28:

TABLE 28 Relative 2θ d (Å) Intensity 8.161 10.825 10.4 8.875 9.9558 6 9.361 9.4402 4.7 9.96 8.8737 3.5 10.522 8.4007 9.9 11.238 7.8669 100 12.722 6.9528 6.4 13.541 6.534 10.6 15.043 5.8845 7.4 15.544 5.6961 8.7 16.079 5.5079 21 16.52 5.3618 41 17.63 5.0266 5.6 18.701 4.741 6.7 19.198 4.6193 9.3 19.98 4.4404 36.8 21.243 4.1791 6.8 22.179 4.0048 59.7 22.677 3.9179 19.2 23.141 3.8405 20.9 24.86 3.5786 18.7 25.638 3.4718 25.8 26.861 3.3164 8.1 27.979 3.1864 10.1 28.376 3.1427 4.7 30.583 2.9208 6 31.917 2.8017 4.5 32.657 2.7398 2.2 33.861 2.6451 5.3

Example 29 N4-(4-([1,2,4]Triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form P

Water (12 mL) was added to a vial containing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G Tetrahydrofuran (1.5 g), and the contents were agitated at room temperature. The contents were filtered and washed with THF:water (1:2.2 v/v. 7.2 mL) and water (7.2 mL). The wet cake was dried in a vacuum oven at 55° C. with a nitrogen bleed to yield Form P (Anhydrous) (81% yield).

The XRPD scan is shown in FIG. 29 and the peak assignments are in Table 29:

TABLE 29 Relative 2θ d (Å) Intensity 6.962 12.687 5.1 9.901 8.9266 38.5 11.043 8.0059 25.4 11.422 7.7411 1.4 12.48 7.0867 1.7 13.123 6.7412 6.9 13.74 6.4396 28.6 14.577 6.0716 10.9 15.403 5.7481 20.5 15.662 5.6536 48.4 16.424 5.3929 13.9 17.661 5.0179 32 18.777 4.7221 6.7 19.92 4.4537 8.1 20.541 4.3204 22.4 21.684 4.0951 4.3 22.14 4.0118 11.7 23.04 3.857 14.6 23.5 3.7826 100 24.271 3.6641 1.8 24.76 3.5929 17.9 25.359 3.5093 8.3 26.982 3.3018 10.3 27.619 3.2271 11.9 28.419 3.138 5.2 29.022 3.0742 6.1 29.923 2.9837 9.1 30.781 2.9024 6.3 31.72 2.8186 4.6 32.044 2.7909 3 32.314 2.7682 2.2 33.441 2.6774 3.2 34.377 2.6066 5.8 35.815 2.5052 2.6 36.376 2.4678 3.4 37.083 2.4224 2.1 38.365 2.3443 1.8 38.827 2.3175 2.1 39.437 2.283 3.1

Example 30 Amorphous N4-(4-([1,2,4]Triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine

N4-(4-([1,2,4]Triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Ethanol (402 mg) was added to a vial containing 3:7 water:THF (40 mL). The solution was sonicated and stirred until all the solids were dissolved. The solution was then frozen in a dry ice/acetone bath (4 hours) and lyophilized over a period of 48 hours to yield an amorphous powder.

The XRPD scan is shown in FIG. 30.

Example 31 Pharmaceutical Composition

A pharmaceutical composition may be prepared by forming a powder in capsule (“PIC”) composition containing 25 mg or 100 mg of N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine from Examples 1 to 30. The PIC composition may be prepared in size 00 white opaque hard gelatin capsules.

It will be understood that the enumerated embodiments are not intended to limit the invention to those embodiments. On the contrary, the invention is intended to cover all alternatives, modifications and equivalents, which may be included within the scope of the present invention as defined by the claims. Thus, the foregoing description is considered as illustrative only of the principles of the invention.

The words “comprise,” “comprising,” “include,” “including,” and “includes” when used in this specification and in the following claims are intended to specify the presence of stated features, integers, components, or steps, but they do not preclude the presence or addition of one or more other features, integers, components, steps, or groups thereof. 

What is claimed is:
 1. A crystalline polymorph of N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine freebase.
 2. The crystalline polymorph of claim 1, wherein the polymorph is Form A.
 3. The crystalline polymorph of claim 2, wherein said polymorph has an XRPD pattern substantially the same as FIG.
 1. 4. The crystalline polymorph of claim 2, wherein said polymorph is characterized by at least one specific XRPD diffraction peak (2θ degrees±0.2) at about 20.3.
 5. A process for preparing the crystalline polymorph of claim 2, comprising: (a) mixing amorphous N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine and 1:1 EtOH:water; and (b) recrystallizing the solid to prepare Form A.
 6. The crystalline polymorph of claim 1, wherein the polymorph is Form B.
 7. The crystalline polymorph of claim 6, wherein said polymorph is characterized by XRPD diffraction peaks (2θ degrees±0.3) at about 9.9 and 25.5.
 8. A process for preparing the crystalline polymorph of claim 6, comprising: (a1) mixing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E with a solvent selected from MeOH, or (a2) mixing amorphous N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine and a solvent selected from MeOH, acetone and DCM, or (a3) mixing N4-(4-([1,2,4]triazolo [1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form C/G mixture with a solvent selected from EtOH, or (a4) mixing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form A with a solvent selected from IPA, (b) creating a solution with the N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine and the solvent, and (c) recrystallizing the solid to prepare Form B; or (d1) mixing either N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E or amorphous N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine and ACN, or (d2) mixing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G mono-Tetrahydrofuran and THF, and (e) recrystallizing the solid to prepare Form B; or (f) heating N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Ethanol, and (g) recovering the solid to prepare Form B.
 9. The crystalline polymorph of claim 6, wherein the polymorph is Form B Methanol.
 10. The crystalline polymorph of claim 9, wherein said polymorph has an XRPD pattern substantially the same as FIG.
 2. 11. The crystalline polymorph of claim 9, wherein said polymorph is characterized by at least one specific XRPD diffraction peak (2θ degrees±0.2) at about 10.0.
 12. A process for preparing the crystalline polymorph of claim 6, comprising: (a) mixing either N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E or amorphous N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine with MeOH; (b) creating a solution with the N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine and MeOH; and (c) recrystallizing the solid to prepare Form B Methanol.
 13. The crystalline polymorph of claim 6, wherein the polymorph is Form B Ethanol.
 14. The crystalline polymorph of claim 13, wherein said polymorph has an XRPD pattern substantially the same as FIG.
 3. 15. The crystalline polymorph of claim 13, wherein said polymorph is characterized by at least one specific XRPD diffraction peak (2θ degrees±0.2) at about 25.4.
 16. A process for preparing the crystalline polymorph of claim 13, comprising: (a) mixing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form C/G mixture with EtOH; (b) creating a solution with the N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine and EtOH; and (c) recrystallizing the solid to prepare Form B Ethanol.
 17. The crystalline polymorph of claim 6, wherein the polymorph is Form B Isopropyl Alcohol.
 18. The crystalline polymorph of claim 17, wherein said polymorph has an XRPD pattern substantially the same as FIG.
 4. 19. The crystalline polymorph of claim 17, wherein said polymorph is characterized by at least one specific XRPD diffraction peak (2θ degrees±0.2) at about 16.9.
 20. A process for preparing the crystalline polymorph of claim 17, comprising: (a) mixing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form A with IPA; (b) creating a solution with the N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine and IPA; and (c) recrystallizing the solid to prepare Form B Isopropyl Alcohol.
 21. The crystalline polymorph of claim 6, wherein the polymorph is Form B Acetonitrile.
 22. The crystalline polymorph of claim 21, wherein said polymorph has an XRPD pattern substantially the same as FIG.
 5. 23. The crystalline polymorph of claim 21, wherein said polymorph is characterized by at least one specific XRPD diffraction peak (2θ degrees±0.2) at about 25.7.
 24. A process for preparing the crystalline polymorph of claim 21, comprising: (a) mixing either N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E or amorphous N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine and ACN; and (b) recrystallizing the solid to prepare Form B Acetonitrile.
 25. The crystalline polymorph of claim 6, wherein the polymorph is Form B Acetone.
 26. The crystalline polymorph of claim 25, wherein said polymorph has an XRPD pattern substantially the same as FIG.
 6. 27. The crystalline polymorph of claim 25, wherein said polymorph is characterized by at least one specific XRPD diffraction peak (2θ degrees±0.2) at about 9.9.
 28. A process for preparing the crystalline polymorph of claim 25, comprising: (a) mixing amorphous N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine and acetone; (b) creating a solution with the N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine and acetone; and (c) recrystallizing the solid to prepare Form B Acetone.
 29. The crystalline polymorph of claim 6, wherein the polymorph is Form B Dichloromethane.
 30. The crystalline polymorph of claim 29, wherein said polymorph has an XRPD pattern substantially the same as FIG.
 7. 31. The crystalline polymorph of claim 29, wherein said polymorph is characterized by at least one specific XRPD diffraction peak (2θ degrees±0.2) at about 16.9.
 32. A process for preparing the crystalline polymorph of claim 29, comprising: (a) mixing amorphous N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine and DCM; (b) creating a solution with the N4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine and DCM; and (c) recrystallizing the solid to prepare Form B Dichloromethane.
 33. The crystalline polymorph of claim 6, wherein the polymorph is Form B Tetrahydrofuran.
 34. The crystalline polymorph of claim 33, wherein said polymorph has an XRPD pattern substantially the same as FIG.
 8. 35. The crystalline polymorph of claim 33, wherein said polymorph is characterized by at least one specific XRPD diffraction peak (2θ degrees±0.2) at about 25.4.
 36. A process for prepping the crystalline polymorph of claim 33, comprising: (a) mixing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G mono-Tetrahydrofuran and THF; and (b) recrystallizing the solid to prepare Form B Tetrahydrofuran.
 37. The crystalline polymorph of claim 6, wherein the polymorph is Form B Anhydrous.
 38. The crystalline polymorph of claim 37, wherein said polymorph has an XRPD pattern substantially the same as FIG.
 9. 39. The crystalline polymorph of claim 37, wherein said polymorph is characterized by at least one specific XRPD diffraction peak (2θ degrees±0.2) at about 9.9.
 40. A process for preparing the crystalline polymorph of claim 37, comprising: (a) heating N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B; and (b) recovering the solid to prepare Form B Anhydrous.
 41. The crystalline polymorph of claim 1, wherein the polymorph is Form C.
 42. The crystalline polymorph of claim 41, wherein said polymorph has an XRPD pattern substantially the same as FIG.
 10. 43. The crystalline polymorph of claim 41, wherein said polymorph is characterized by at least one specific XRPD diffraction peak (2θ degrees±0.2) at about 5.0.
 44. A process for preparing the crystalline polymorph of claim 41, comprising: (a) mixing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form A and 2-methoxyethanol; (b) creating a solution with the N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine and 2-methoxyethanol; and (c) recrystallizing the solid to prepare Form C.
 45. The crystalline polymorph of claim 1, wherein the polymorph is Form D.
 46. The crystalline polymorph of claim 45, wherein said polymorph is characterized by XRPD diffraction peaks (2θ degrees±0.3) at about 8.0 and 12.7.
 47. A process for preparing the crystalline polymorph of claim 45, comprising: (a1) mixing amorphous N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine and a solvent selected from EtOAc, dioxane and propyl acetate, or (a2) mixing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E and a solvent selected from acetone and propyl acetate, and (b) recrystallizing the solid to prepare Form D.
 48. The crystalline polymorph of claim 45, wherein the polymorph is Form D Ethyl Acetate.
 49. The crystalline polymorph of claim 48, wherein said polymorph has an XRPD pattern substantially the same as FIG.
 11. 50. The crystalline polymorph of claim 48, wherein said polymorph is characterized by at least one specific XRPD diffraction peak (2θ degrees±0.2) at about 8.0.
 51. A process for preparing the crystalline polymorph of claim 48, comprising: (a) mixing amorphous N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine and EtOAc; and (b) recrystallizing the solid to prepare Form D Ethyl Acetate.
 52. The crystalline polymorph of claim 45, wherein the polymorph is Form D Dioxane.
 53. The crystalline polymorph of claim 52, wherein said polymorph has an XRPD pattern substantially the same as FIG.
 12. 54. The crystalline polymorph of claim 52, wherein said polymorph is characterized by at least one specific XRPD diffraction peak (2θ degrees±0.2) at about 19.5.
 55. A process for preparing the crystalline polymorph of claim 52, comprising: (a) mixing amorphous N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine and dioxane; and (b) recrystallizing the solid to prepare Form D Dioxane.
 56. The crystalline polymorph of claim 45, wherein the polymorph is Form D Acetone.
 57. The crystalline polymorph of claim 56, wherein said polymorph has an XRPD pattern substantially the same as FIG.
 13. 58. The crystalline polymorph of claim 56, wherein said polymorph is characterized by at least one specific XRPD diffraction peak (2θ degrees±0.2) at about 8.0.
 59. A process for preparing the crystalline polymorph of claim 56, comprising: (a) mixing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E and acetone; and (b) recrystallizing the solid to prepare Form D Acetone.
 60. The crystalline polymorph of claim 45, wherein the polymorph is Form D Propyl Acetate.
 61. The crystalline polymorph of claim 60, wherein said polymorph has an XRPD pattern substantially the same as FIG.
 14. 62. The crystalline polymorph of claim 60, wherein said polymorph is characterized by at least one specific XRPD diffraction peak (2θ degrees±0.2) at about 8.0.
 63. A process for preparing the crystalline polymorph of claim 60, comprising: (a) mixing either N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E or amorphous N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine and propyl acetate; and (b) recrystallizing the solid to prepare Form D Propyl Acetate.
 64. The crystalline polymorph of claim 1, wherein the polymorph is Form E.
 65. The crystalline polymorph of claim 64, wherein said polymorph has an XRPD pattern substantially the same as FIG.
 15. 66. The crystalline polymorph of claim 64, wherein said polymorph is characterized by at least one specific XRPD diffraction peak (2θ degrees±0.2) at about 16.1.
 67. A process for preparing the crystalline polymorph of claim 64, comprising: (a) mixing 1-(4-((4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)amino)quinazolin-6-yl)-3-(1-hydroxy-2-methylpropan-2-yl)thiourea in THF under basic conditions; (b) adding water to the mixture to form an oil of N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine; (c) recovering the product as N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E.
 68. The crystalline polymorph of claim 1, wherein the polymorph is Form F.
 69. The crystalline polymorph of claim 68, wherein said polymorph has an XRPD pattern substantially the same as FIG.
 16. 70. The crystalline polymorph of claim 68, wherein said polymorph is characterized by at least one specific XRPD diffraction peak (2θ degrees±0.2) at about 16.6.
 71. A process for preparing the crystalline polymorph of claim 68, comprising: (a) mixing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E and ethyl acetate; and (b) recrystallizing the solid to prepare Form F.
 72. The crystalline polymorph of claim 1, wherein the polymorph is Form G.
 73. The crystalline polymorph of claim 72, wherein said polymorph is characterized by XRPD diffraction peaks (2θ degrees±0.3) at about 7.8 and 23.2.
 74. A process for preparing the crystalline polymorph of claim 72, comprising: (a1) mixing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G mono-Tetrahydrofuran and 20:80 THF:water, or (a2) mixing either N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methyl phenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E or amorphous N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine and a solvent selected from isopropyl acetate and MIBK, and (b) recrystallizing the solid to prepare Form G; or (c) mixing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form A and tetrahydrofuran, (d) creating a solution with the N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine and THF, and (e) recrystallizing the solid to prepare Form G.
 75. The crystalline polymorph of claim 72, wherein the polymorph is Form G hemi-Tetrahydrofuran.
 76. The crystalline polymorph of claim 75, wherein said polymorph has an XRPD pattern substantially the same as FIG.
 17. 77. The crystalline polymorph of claim 75, wherein said polymorph is characterized by at least one specific XRPD diffraction peak (2θ degrees±0.2) at about 23.1.
 78. A process for preparing the crystalline polymorph of claim 75, comprising: (a) mixing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G mono-Tetrahydrofuran and 20:80 THF:water; and (b) recrystallizing the solid to prepare Form G hemi-Tetrahydrofuran.
 79. The crystalline polymorph of claim 72, wherein the polymorph is Form G mono-Tetrahydrofuran.
 80. The crystalline polymorph of claim 79, wherein said polymorph has an XRPD pattern substantially the same as FIG.
 18. 81. The crystalline polymorph of claim 79, wherein said polymorph is characterized by at least one specific XRPD diffraction peak (2θ degrees±0.2) at about 23.1.
 82. A process for preparing the crystalline polymorph of claim 79, comprising: (a) mixing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form A and tetrahydrofuran; (b) creating a solution with the N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine and THF; and (c) recrystallizing the solid to prepare Form G mono-Tetrahydrofuran.
 83. The crystalline polymorph of claim 72, wherein the polymorph is Form G Isopropyl Acetate.
 84. The crystalline polymorph of claim 83, wherein said polymorph has an XRPD pattern substantially the same as FIG.
 19. 85. The crystalline polymorph of claim 83, wherein said polymorph is characterized by at least one specific XRPD diffraction peak (2θ degrees±0.2) at about 23.4.
 86. A process for preparing the crystalline polymorph of claim 83, comprising: (a) mixing either N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E or amorphous N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine and isopropyl acetate; and (b) recrystallizing the solid to prepare Form G Isopropyl Acetate.
 87. The crystalline polymorph of claim 72, wherein the polymorph is Form G Methyl Isobutyl Ketone.
 88. The crystalline polymorph of claim 87, wherein said polymorph has an XRPD pattern substantially the same as FIG.
 20. 89. The crystalline polymorph of claim 87, wherein said polymorph is characterized by at least one specific XRPD diffraction peak (2θ degrees±0.2) at about 23.3.
 90. A process for preparing the crystalline polymorph of claim 87, comprising: (a) mixing either N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E or amorphous N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine and MIBK; and (b) recrystallizing the solid to prepare Form G Methyl Isobutyl Ketone.
 91. The crystalline polymorph of claim 1, wherein the polymorph is Form H.
 92. The crystalline polymorph of claim 91, wherein said polymorph has an XRPD pattern substantially the same as FIG.
 21. 93. The crystalline polymorph of claim 91, wherein said polymorph is characterized by at least one specific XRPD diffraction peak (29 degrees±0.2) at about 11.2.
 94. A process for preparing the crystalline polymorph of claim 91, comprising: (a) mixing amorphous N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine and MTBE; and (b) recrystallizing the solid to prepare Form H.
 95. The crystalline polymorph of claim 1, wherein the polymorph is Form I.
 96. The crystalline polymorph of claim 95, wherein said polymorph has an XRPD pattern substantially the same as FIG.
 22. 97. The crystalline polymorph of claim 95, wherein said polymorph is characterized by at least one specific XRPD diffraction peak (2θ degrees±0.2) at about 7.2.
 98. A process for preparing the crystalline polymorph of claim 95, comprising: (a) mixing amorphous N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine and xylene; and (b) recrystallizing the solid to prepare Form I.
 99. The crystalline polymorph of claim 1, wherein the polymorph is Form J.
 100. The crystalline polymorph of claim 99, wherein said polymorph has an XRPD pattern substantially the same as FIG.
 23. 101. The crystalline polymorph of claim 99, wherein said polymorph is characterized by at least one specific XRPD diffraction peak (2θ degrees±0.2) at about 17.0.
 102. A process for preparing the crystalline polymorph of claim 99, comprising: (a) mixing either N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E or amorphous N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine and 2-methoxyethanol; and (b) recrystallizing the solid to prepare Form J.
 103. The crystalline polymorph of claim 1, wherein the polymorph is Form K.
 104. The crystalline polymorph of claim 103, wherein said polymorph has an XRPD pattern substantially the same as FIG.
 24. 105. The crystalline polymorph of claim 103, wherein said polymorph is characterized by at least one specific XRPD diffraction peak (2θ degrees±0.2) at about 22.8.
 106. A process for preparing the crystalline polymorph of claim 103, comprising: (a) mixing either N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E or amorphous N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine and DME; and (b) recrystallizing the solid to prepare Form K.
 107. The crystalline polymorph of claim 1, wherein the polymorph is Form L.
 108. The crystalline polymorph of claim 107, wherein said polymorph has an XRPD pattern substantially the same as FIG.
 25. 109. The crystalline polymorph of claim 107, wherein said polymorph is characterized by at least one specific XRPD diffraction peak (2θ degrees±0.2) at about 17.0.
 110. A process for preparing the crystalline polymorph of claim 107, comprising: (a) mixing either N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form E or amorphous N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine and MeOAc; and (b) recrystallizing the solid to prepare Form L.
 111. The crystalline polymorph of claim 1, wherein the polymorph is Form M.
 112. The crystalline polymorph of claim 111, wherein said polymorph has an XRPD pattern substantially the same as FIG.
 26. 113. The crystalline polymorph of claim 111, wherein said polymorph is characterized by at least one specific XRPD diffraction peak (2θ degrees±0.2) at about 9.0.
 114. A process for preparing the crystalline polymorph of claim 111, comprising: (a) mixing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Ethanol and 1:1 THF:water; and (b) recrystallizing the solid to prepare Form M.
 115. The crystalline polymorph of claim 1 wherein the polymorph is Form N.
 116. The crystalline polymorph of claim 115, wherein said polymorph has an XRPD pattern substantially the same as FIG.
 27. 117. The crystalline polymorph of claim 115, wherein said polymorph is characterized by at least one specific XRPD diffraction peak (2θ degrees±0.2) at about 22.9.
 118. A process for preparing the crystalline polymorph of claim 115, comprising: (a) mixing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form B Ethanol and a solution of 1% sodium carboxymethyl cellulose, 0.1% Tween® in water; and (b) recrystallizing the solid to prepare Form N.
 119. The crystalline polymorph of claim 1, wherein the polymorph is Form O.
 120. The crystalline polymorph of claim 119, wherein said polymorph has an XRPD pattern substantially the same as FIG.
 28. 121. The crystalline polymorph of claim 119, wherein said polymorph is characterized by at least one specific XRPD diffraction peak (2θ degrees±0.2) at about 11.2.
 122. A process for preparing the crystalline polymorph of claim 119, comprising: (a) mixing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G hemi-Tetrahydrofuran with THF; (b) creating a solution with the N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine and THF; and (c) recrystallizing the solid to prepare Form O.
 123. The crystalline polymorph of claim 1, wherein the polymorph is Form P.
 124. The crystalline polymorph of claim 123, wherein said polymorph has an XRPD pattern substantially the same as FIG.
 29. 125. The crystalline polymorph of claim 123, wherein said polymorph is characterized by at least one specific XRPD diffraction peak (2θ degrees±0.2) at about 23.5.
 126. A process for preparing the crystalline polymorph of claim 123, comprising: (a) mixing N4-(4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)-3-methylphenyl)-N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)quinazoline-4,6-diamine Form G Tetrahydrofuran with water; and (b) recrystallizing the solid to prepare Form P.
 127. A pharmaceutical composition comprising a compound of claim 1, and a pharmaceutically acceptable carrier or excipient. 